This is the README for how to set up the Fossil/JSON test web page
under Apache on Unix systems. This is only intended only for
Fossil/JSON developers/tinkerers:

First, copy cgi-bin/fossil-json.cgi.example to
cgi-bin/fossil-json.cgi.  Edit it and correct the paths to the fossil
binary and the repo you want to serve. Make it executable.

MAKE SURE that the fossil repo you use is world-writable OR that your
Web/CGI server is set up to run as the user ID of the owner of the
fossil file. ALSO: the DIRECTORY CONTAINING the repo file must be
writable by the CGI process.

Next, set up an apache vhost entry. Mine looks like:

<VirtualHost *:80>
    ServerAlias fjson
    ScriptAlias /cgi-bin/ /home/stephan/cvs/fossil/fossil-json/ajax/cgi-bin/
    DocumentRoot /home/stephan/cvs/fossil/fossil-json/ajax
</VirtualHost>

Now add your preferred vhost name (fjson in the above example) to /etc/hosts:

  127.0.0.1 ...other aliases... fjson

Restart your Apache.

Now visit: http://fjson/

that will show the test/demo page. If it doesn't, edit index.html and
make sure that:

  WhAjaj.Connector.options.ajax.url = ...;

points to your CGI script. In theory you can also do this over fossil
standalone server mode, but i haven't yet tested that particular test
page in that mode.

#!/path/to/fossil/binary
repository: /path/to/repo.fsl

var FShell = {
    serverUrl:
        'http://localhost:8080'
        //'http://fjson/cgi-bin/fossil-json.cgi'
        //'http://192.168.1.62:8080'
        //'http://fossil.wanderinghorse.net/repos/fossil-json-java/index.cgi'
        ,
    verbose:false,
    prompt:"fossil shell > ",
    wiki:{},
    consol:java.lang.System.console(),
    v:function(msg){
        if(this.verbose){
            print("VERBOSE: "+msg);
        }
    }
};
(function bootstrap() {
    var srcdir = '../js/';
    var includes = [srcdir+'json2.js',
                    srcdir+'whajaj.js',
                    srcdir+'fossil-ajaj.js'
                    ];
    for( var i in includes ) {
        load(includes[i]);
    }
    WhAjaj.Connector.prototype.sendImpl = WhAjaj.Connector.sendImpls.rhino;
    FShell.fossil = new FossilAjaj({
        asynchronous:false, /* rhino-based impl doesn't support async. */
        timeout:10000,
        url:FShell.serverUrl
    });
    print("Server: "+FShell.serverUrl);
    var cb = FShell.fossil.ajaj.callbacks;
    cb.beforeSend = function(req,opt){
        if(!FShell.verbose) return;
        print("SENDING REQUEST: AJAJ options="+JSON.stringify(opt));
        if(req) print("Request envelope="+WhAjaj.stringify(req));
    };
    cb.afterSend = function(req,opt){
        //if(!FShell.verbose) return;
        //print("REQUEST RETURNED: opt="+JSON.stringify(opt));
        //if(req) print("Request="+WhAjaj.stringify(req));
    };
    cb.onError = function(req,opt){
        //if(!FShell.verbose) return;
        print("ERROR: "+WhAjaj.stringify(opt));
    };
    cb.onResponse = function(resp,req){
        if(!FShell.verbose) return;
        if(resp && resp.resultCode){
            print("Response contains error info: "+resp.resultCode+": "+resp.resultText);
        }
        print("GOT RESPONSE: "+(('string'===typeof resp) ? resp : WhAjaj.stringify(resp)));
    };
    FShell.fossil.HAI({
        onResponse:function(resp,opt){
            assertResponseOK(resp);
        }
    });
})();

/**
    Throws an exception of cond is a falsy value.
*/
function assert(cond, descr){
    descr = descr || "Undescribed condition.";
    if(!cond){
        throw new Error("Assertion failed: "+descr);
    }else{
        //print("Assertion OK: "+descr);
    }
}

/**
    Convenience form of FShell.fossil.sendCommand(command,payload,ajajOpt).
*/
function send(command,payload, ajajOpt){
    FShell.fossil.sendCommand(command,payload,ajajOpt);
}

/**
    Asserts that resp is-a Object, resp.fossil is-a string, and
    !resp.resultCode.
*/
function assertResponseOK(resp){
    assert('object' === typeof resp,'Response is-a object.');
    assert( 'string' === typeof resp.fossil, 'Response contains fossil property.');
    assert( !resp.resultCode, 'resp.resultCode='+resp.resultCode);
}
/**
    Asserts that resp is-a Object, resp.fossil is-a string, and
    resp.resultCode is a truthy value. If expectCode is set then
    it also asserts that (resp.resultCode=='FOSSIL-'+expectCode).
*/
function assertResponseError(resp,expectCode){
    assert('object' === typeof resp,'Response is-a object.');
    assert( 'string' === typeof resp.fossil, 'Response contains fossil property.');
    assert( resp.resultCode, 'resp.resultCode='+resp.resultCode);
    if(expectCode){
        assert( 'FOSSIL-'+expectCode == resp.resultCode, 'Expecting result code '+expectCode );
    }
}

FShell.readline = (typeof readline === 'function') ? (readline) : (function() {
     importPackage(java.io);
     importPackage(java.lang);
     var stdin = new BufferedReader(new InputStreamReader(System['in']));
     var self = this;
     return function(prompt) {
        if(prompt) print(prompt);
        var x = stdin.readLine();
        return null===x ? x : String(x) /*convert to JS string!*/;
     };
}());

FShell.dispatchLine = function(line){
    var av = line.split(' '); // FIXME: to shell-like tokenization. Too tired!
    var cmd = av[0];
    var key, h;
    if('/' == cmd[0]) key = '/';
    else key = this.commandAliases[cmd];
    if(!key) key = cmd;
    h = this.commandHandlers[key];
    if(!h){
        print("Command not known: "+cmd +" ("+key+")");
    }else if(!WhAjaj.isFunction(h)){
        print("Not a function: "+key);
    }
    else{
        print("Sending ["+key+"] command... ");
        try{h(av);}
        catch(e){ print("EXCEPTION: "+e); }
    }
};

FShell.onResponseDefault = function(callback){
    return function(resp,req){
        assertResponseOK(resp);
        print("Payload: "+(resp.payload ? WhAjaj.stringify(resp.payload) : "none"));
        if(WhAjaj.isFunction(callback)){
            callback(resp,req);
        }
    };
};
FShell.commandHandlers = {
    "?":function(args){
        var k;
        print("Available commands...\n");
        var o = FShell.commandHandlers;
        for(k in o){
            if(! o.hasOwnProperty(k)) continue;
            print("\t"+k);
        }
    },
    "/":function(args){
        FShell.fossil.sendCommand('/json'+args[0],undefined,{
            beforeSend:function(req,opt){
                print("Sending to: "+opt.url);
            },
            onResponse:FShell.onResponseDefault()
        });
    },
    "eval":function(args){
        eval(args.join(' '));
    },
    "login":function(args){
        FShell.fossil.login(args[1], args[2], {
            onResponse:FShell.onResponseDefault()
        });
    },
    "whoami":function(args){
        FShell.fossil.whoami({
            onResponse:FShell.onResponseDefault()
        });
    },
    "HAI":function(args){
        FShell.fossil.HAI({
            onResponse:FShell.onResponseDefault()
        });
    }

};
FShell.commandAliases = {
    "li":"login",
    "lo":"logout",
    "who":"whoami",
    "hi":"HAI",
    "tci":"/timeline/ci?limit=3"
};
FShell.mainLoop = function(){
    var line;
    var check = /\S/;
    //var isJavaNull = /java\.lang\.null/;
    //print(typeof java.lang['null']);
    while( null != (line=this.readline(this.prompt)) ){
        if(null===line) break /*EOF*/;
        else if( "" === line ) continue;
        //print("Got line: "+line);
        else if(!check.test(line)) continue;
        print('typeof line = '+typeof line);
        this.dispatchLine(line);
        print("");
    }
    print("Bye!");
};

FShell.mainLoop();

var TestApp = {
    serverUrl:
        'http://localhost:8080'
        //'http://fjson/cgi-bin/fossil-json.cgi'
        //'http://192.168.1.62:8080'
        //'http://fossil.wanderinghorse.net/repos/fossil-json-java/index.cgi'
        ,
    verbose:false,
    fossilBinary:'fossil',
    wiki:{}
};
(function bootstrap() {
    var srcdir = '../js/';
    var includes = [srcdir+'json2.js',
                    srcdir+'whajaj.js',
                    srcdir+'fossil-ajaj.js'
                    ];
    for( var i in includes ) {
        load(includes[i]);
    }
    WhAjaj.Connector.prototype.sendImpl = WhAjaj.Connector.sendImpls.rhino;
    TestApp.fossil = new FossilAjaj({
        asynchronous:false, /* rhino-based impl doesn't support async or timeout. */
        timeout:0,
        url:TestApp.serverUrl,
        fossilBinary:TestApp.fossilBinary
    });
    var cb = TestApp.fossil.ajaj.callbacks;
    cb.beforeSend = function(req,opt){
        if(!TestApp.verbose) return;
        print("SENDING REQUEST: AJAJ options="+JSON.stringify(opt));
        if(req) print("Request envelope="+WhAjaj.stringify(req));
    };
    cb.afterSend = function(req,opt){
        //if(!TestApp.verbose) return;
        //print("REQUEST RETURNED: opt="+JSON.stringify(opt));
        //if(req) print("Request="+WhAjaj.stringify(req));
    };
    cb.onError = function(req,opt){
        if(!TestApp.verbose) return;
        print("ERROR: "+WhAjaj.stringify(opt));
    };
    cb.onResponse = function(resp,req){
        if(!TestApp.verbose) return;
        print("GOT RESPONSE: "+(('string'===typeof resp) ? resp : WhAjaj.stringify(resp)));
    };
    
})();

/**
    Throws an exception of cond is a falsy value.
*/
function assert(cond, descr){
    descr = descr || "Undescribed condition.";
    if(!cond){
        print("Assertion FAILED: "+descr);
        throw new Error("Assertion failed: "+descr);
        // aarrgghh. Exceptions are of course swallowed by
        // the AJAX layer, to keep from killing a browser's
        // script environment.
    }else{
        if(TestApp.verbose) print("Assertion OK: "+descr);
    }
}

/**
    Calls func() in a try/catch block and throws an exception if
    func() does NOT throw.
*/
function assertThrows(func, descr){
    descr = descr || "Undescribed condition failed.";
    var ex;
    try{
        func();
    }catch(e){
        ex = e;
    }
    if(!ex){
        throw new Error("Function did not throw (as expected): "+descr);
    }else{
        if(TestApp.verbose) print("Function threw (as expected): "+descr+": "+ex);
    }
}

/**
    Convenience form of TestApp.fossil.sendCommand(command,payload,ajajOpt).
*/
function send(command,payload, ajajOpt){
    TestApp.fossil.sendCommand(command,payload,ajajOpt);
}

/**
    Asserts that resp is-a Object, resp.fossil is-a string, and
    !resp.resultCode.
*/
function assertResponseOK(resp){
    assert('object' === typeof resp,'Response is-a object.');
    assert( 'string' === typeof resp.fossil, 'Response contains fossil property.');
    assert( undefined === resp.resultCode, 'resp.resultCode is not set');
}
/**
    Asserts that resp is-a Object, resp.fossil is-a string, and
    resp.resultCode is a truthy value. If expectCode is set then
    it also asserts that (resp.resultCode=='FOSSIL-'+expectCode).
*/
function assertResponseError(resp,expectCode){
    assert('object' === typeof resp,'Response is-a object.');
    assert( 'string' === typeof resp.fossil, 'Response contains fossil property.');
    assert( !!resp.resultCode, 'resp.resultCode='+resp.resultCode);
    if(expectCode){
        assert( 'FOSSIL-'+expectCode == resp.resultCode, 'Expecting result code '+expectCode );
    }
}

function testHAI(){
    var rs;
    TestApp.fossil.HAI({
        onResponse:function(resp,req){
            rs = resp;
        }
    });
    assertResponseOK(rs);
    TestApp.serverVersion = rs.fossil;
    assert( 'string' === typeof TestApp.serverVersion, 'server version = '+TestApp.serverVersion);
}
testHAI.description = 'Get server version info.';

function testIAmNobody(){
    TestApp.fossil.whoami('/json/whoami');
    assert('nobody' === TestApp.fossil.auth.name, 'User == nobody.' );
    assert(!TestApp.fossil.auth.authToken, 'authToken is not set.' );
   
}
testIAmNobody.description = 'Ensure that current user is "nobody".';


function testAnonymousLogin(){
    TestApp.fossil.login();
    assert('string' === typeof TestApp.fossil.auth.authToken, 'authToken = '+TestApp.fossil.auth.authToken);
    assert( 'string' === typeof TestApp.fossil.auth.name, 'User name = '+TestApp.fossil.auth.name);
    TestApp.fossil.userName = null;
    TestApp.fossil.whoami('/json/whoami');
    assert( 'string' === typeof TestApp.fossil.auth.name, 'User name = '+TestApp.fossil.auth.name);
}
testAnonymousLogin.description = 'Perform anonymous login.';

function testAnonWiki(){
    var rs;
    TestApp.fossil.sendCommand('/json/wiki/list',undefined,{
        beforeSend:function(req,opt){
            assert( req && (req.authToken==TestApp.fossil.auth.authToken), 'Request envelope contains expected authToken.'  );
        },
        onResponse:function(resp,req){
            rs = resp;
        }
    });
    assertResponseOK(rs);
    assert( (typeof [] === typeof rs.payload) && rs.payload.length,
        "Wiki list seems to be okay.");
    TestApp.wiki.list = rs.payload;

    TestApp.fossil.sendCommand('/json/wiki/get',{
        name:TestApp.wiki.list[0]
    },{
        onResponse:function(resp,req){
            rs = resp;
        }
    });
    assertResponseOK(rs);
    assert(rs.payload.name == TestApp.wiki.list[0], "Fetched page name matches expectations.");
    print("Got first wiki page: "+WhAjaj.stringify(rs.payload));

}
testAnonWiki.description = 'Fetch wiki list as anonymous user.';

function testAnonLogout(){
    var rs;
    TestApp.fossil.logout({
        onResponse:function(resp,req){
            rs = resp;
        }
    });
    assertResponseOK(rs);
    print("Ensure that second logout attempt fails...");
    TestApp.fossil.logout({
        onResponse:function(resp,req){
            rs = resp;
        }
    });
    assertResponseError(rs);
}
testAnonLogout.description = 'Log out anonymous user.';

function testExternalProcess(){

    var req = { command:"HAI", requestId:'testExternalProcess()' };
    var args = [TestApp.fossilBinary, 'json', '--json-input', '-'];
    var p = java.lang.Runtime.getRuntime().exec(args);
    var outs = p.getOutputStream();
    var osr = new java.io.OutputStreamWriter(outs);
    var osb = new java.io.BufferedWriter(osr);
    var json = JSON.stringify(req);
    osb.write(json,0, json.length);
    //osb.flush();
    osb.close();
    var ins = p.getInputStream();
    var isr = new java.io.InputStreamReader(ins);
    var br = new java.io.BufferedReader(isr);
    var line;
    
    while( null !== (line=br.readLine())){
        print(line);
    }
    //outs.close();
    ins.close();
}
testExternalProcess.description = 'Run fossil as external process.';

function testExternalProcessHandler(){
    var aj = TestApp.fossil.ajaj;
    var oldImpl = aj.sendImpl;
    aj.sendImpl = FossilAjaj.rhinoLocalBinarySendImpl;
    var rs;
    TestApp.fossil.sendCommand('/json/HAI',undefined,{
        onResponse:function(resp,opt){
            rs = resp;
        }
    });
    aj.sendImpl = oldImpl;
    assertResponseOK(rs);
    print("Using local fossil binary via AJAX interface, we fetched: "+
        WhAjaj.stringify(rs));
}
testExternalProcessHandler.description = 'Try local fossil binary via AJAX interface.';

(function runAllTests(){
    var testList = [
        testHAI,
        testIAmNobody,
        testAnonymousLogin,
        testAnonWiki,
        testAnonLogout,
        //testExternalProcess,
        testExternalProcessHandler
    ];
    var i, f;
    for( i = 0; i < testList.length; ++i ){
        f = testList[i];
        try{
            print("Running test #"+(i+1)+": "+(f.description || "no description."));
            f();
        }catch(e){
            print("Test #"+(i+1)+" failed: "+e);
            throw e;
        }
    }

})();

print("Done! If you don't see an exception message in the last few lines, you win!");

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

<head>
	<title>Fossil/JSON raw request sending</title>
	<meta http-equiv="content-type" content="text/html;charset=utf-8" />
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> 
    <script type="text/javascript" src="js/whajaj.js"></script>
    <script type="text/javascript" src="js/fossil-ajaj.js"></script>

<style type='text/css'>
th {
  text-align: left;
  background-color: #ececec;  
}

.dangerWillRobinson {
    background-color: yellow;
}
</style>

<script type='text/javascript'>
WhAjaj.Connector.options.ajax.url =
/*
    Change this to your CGI/server root path:
*/
     //'http://fjson/cgi-bin/fossil.cgi'
     //'/repos/fossil-sgb/json.cgi'
    '/cgi-bin/fossil-json.cgi'
     ;
var TheApp = {
      response:null,
      sessionID:null,
      jqe:{}/*jqe==jQuery Elements*/,
      ajaxCount:0,
      cgi: new FossilAjaj()
};


TheApp.startAjaxNotif = function()
{
    ++this.ajaxCount;
    TheApp.jqe.responseContainer.removeClass('dangerWillRobinson');
    this.jqe.ajaxNotification.attr( 'title', this.ajaxCount+" pending AJAX operation(s)..." );
    if( 1 == this.ajaxCount ) this.jqe.ajaxNotification.fadeIn();
};

TheApp.endAjaxNotif = function()
{
    --this.ajaxCount;
    this.jqe.ajaxNotification.attr( 'title', this.ajaxCount+" pending AJAX operation(s)..." );
    if( 0 == this.ajaxCount ) this.jqe.ajaxNotification.fadeOut();
};

TheApp.responseContainsError = function(resp) {
    if( resp && resp.resultCode ) {
        //alert("Error response:\n"+JSON.stringify(resp,0,4));
        TheApp.jqe.taResponse.val( "RESPONSE CONTAINS ERROR INFO:\n"+WhAjaj.stringify(resp) );
        //TheApp.jqe.responseContainer.css({backgroundColor:'yellow'});
        //TheApp.jqe.responseContainer.addClass('dangerWillRobinson');
        TheApp.jqe.responseContainer.flash( '255,0,0', 1500 );
        return true;
    }
    return false;
};


TheApp.sendRequest = function() {
    var path = this.jqe.textPath.val();
    var self = this;
    var data = this.jqe.taRequest.val();
    var doPost = (data && data.length);
    var req;
    if( doPost ) try {
        req = JSON.parse(data);
    }
    catch(e) {
        TheApp.jqe.taResponse.val("Request is not valid JSON.\n"+e);
        return;
    }
    if( req ) {
        req.requestId = this.cgi.generateRequestId();
    }
    var self = this;
    var opt = {
        url: WhAjaj.Connector.options.ajax.url + path,
        method: doPost ? 'POST' : 'GET'
    };
    this.cgi.sendRequest( req, opt );
};
jQuery.fn.animateHighlight = function(highlightColor, duration) {
    var highlightBg = highlightColor || "#FFFF9C";
    var animateMs = duration || 1500;
    var originalBg = this.css("backgroundColor");
    this.stop().css("background-color", highlightBg).animate({backgroundColor: originalBg}, animateMs);
};
jQuery.fn.flash = function( color, duration )
{
    var current = this.css( 'color' );
    this.animate( { color: 'rgb(' + color + ')' }, duration / 2);
    this.animate( { color: current }, duration / 2 );
};

function myJsonPCallback(obj){
    alert("JSONP callback got:\n"+WhAjaj.stringify(obj));
}

jQuery(document).ready(function(){
    var ids = [// list of HTML element IDs we use often.
        'btnSend',
        'ajaxNotification',
        'currentAuthToken',
        'responseContainer',
        'taRequest',
        'taRequestOpt',
        'taResponse',
        'textPath',
        'timer'
    ];
    var i, k;
    for( i = 0; i < ids.length; ++i ) {
        k = ids[i];
        TheApp.jqe[k] = jQuery('#'+k);
    }
    TheApp.jqe.textPath.
        keyup(function(event){
            if(event.keyCode == 13){
                TheApp.sendRequest();
            }
        });
    TheApp.timer = {
        _tstart:0,_tend:0,duration:0,
        start:function(){
            this._tstart = (new Date()).getTime();
        },
        end:function(){
            this._tend = (new Date()).getTime();
            return this.duration = this._tend - this._tstart;
        }
    };

    var ajcb = TheApp.cgi.ajaj.callbacks;
    ajcb.beforeSend = function(req,opt) {
        TheApp.timer.start();
        var val =
            req ?
            (('string'===typeof req) ? req : WhAjaj.stringify(req))
            : '';
        TheApp.jqe.taResponse.val('');
        TheApp.jqe.taRequest.val( val );
        TheApp.jqe.taRequestOpt.val( opt ? WhAjaj.stringify(opt) : '' );
        TheApp.startAjaxNotif();
    };
    ajcb.afterSend = function(req,opt) {
        TheApp.timer.end();
        TheApp.endAjaxNotif();
        TheApp.jqe.timer.text( "(Round-trip time (incl. JS overhead): "+TheApp.timer.duration+'ms)' );
    };
    ajcb.onResponse = function(resp,req, opt) {
        var val;
        if(this.jsonp) return /*was already handled*/;
        try {
            val = WhAjaj.stringify(resp);
        }
        catch(e) {
            val = WhAjaj.stringify(e)
        }
        //alert("onResponse this:"+WhAjaj.stringify(this));
        //alert("val="+val);
        // FIXME: this.url is hosed for login because of how i overload onResponse()
        if( opt.url ) TheApp.jqe.textPath.val(opt.url.replace(WhAjaj.Connector.options.ajax.url,''));
        TheApp.jqe.taResponse.val( val );
    };
    ajcb.onError = function(req,opt) {
        TheApp.jqe.taResponse.val( "ERROR SENDING REQUEST:\n"+WhAjaj.stringify(opt) );
    };

    TheApp.cgi.onLogin = function(){
      TheApp.jqe.taResponse.val( "Logged in:\n"+WhAjaj.stringify(this.auth));
      TheApp.jqe.currentAuthToken.html("Logged in: "+WhAjaj.stringify(this.auth));
    };
    TheApp.cgi.onLogout = function(){
      TheApp.jqe.taResponse.val( "Logged out!" );
      TheApp.jqe.currentAuthToken.text("Not logged in");
    };
    TheApp.cgi.whoami();
    jQuery('#headerArea').click(function(){
        jQuery(this).slideUp('fast',function(){
            jQuery(this).remove();
        });
    });
});

</script>

</head>

<body>
<span id='ajaxNotification'></span>
<div id='headerArea'>
<h1>You know, for sending raw JSON requests to Fossil...</h1>

If you're actually using this page, then you know what you're doing and don't
need help text, hoverhelp, and a snazzy interface.

<br><br>


JSON API docs: <a href='https://docs.google.com/document/d/1fXViveNhDbiXgCuE7QDXQOKeFzf2qNUkBEgiUvoqFN4/edit'>https://docs.google.com/document/d/1fXViveNhDbiXgCuE7QDXQOKeFzf2qNUkBEgiUvoqFN4/edit</a>

</div><!-- #headerArea -->
See also: <a href='wiki-editor.html'>prototype wiki editor</a>.

<h2>Request...</h2>

Path: <input type='text' size='40' id='textPath' value='/json/HAI'/>
<input type='button' value='Send...' id='btnSend' onclick='TheApp.sendRequest()' /><br/>
If the POST textarea is not empty then it will be posted with the request.
<hr/>
<strong>Quick-posts:</strong><br/>
<input type='button' value='HAI' onclick='TheApp.cgi.HAI()' />
<input type='button' value='HAI JSONP' onclick='TheApp.cgi.sendCommand("/json/HAI",undefined,{jsonp:"myJsonPCallback"});' />
<input type='button' value='version' onclick='TheApp.cgi.sendCommand("/json/version")' />
<input type='button' value='stat' onclick='TheApp.cgi.sendCommand("/json/stat?full=0")' />
<input type='button' value='whoami' onclick='TheApp.cgi.whoami()' />
<input type='button' value='cap' onclick='TheApp.cgi.sendCommand("/json/cap")' />
<input type='button' value='resultCodes' onclick='TheApp.cgi.sendCommand("/json/resultCodes")' />
<input type='button' value='g' onclick='TheApp.cgi.sendCommand("/json/g")' />

<br/>

<input type='button' value='branch/list' onclick='TheApp.cgi.sendCommand("/json/branch/list")' />
<input type='button' value='timeline/ci' onclick='TheApp.cgi.sendCommand("/json/timeline/ci?files=true")' />
<input type='button' value='timeline/wiki' onclick='TheApp.cgi.sendCommand("/json/timeline/wiki")' />
<input type='button' value='timeline/ticket' onclick='TheApp.cgi.sendCommand("/json/timeline/ticket")' />
<input type='button' value='timeline/branch' onclick='TheApp.cgi.sendCommand("/json/timeline/branch")' />
<input type='button' value='wiki/list' onclick='TheApp.cgi.sendCommand("/json/wiki/list")' />
<input type='button' value='wiki/get Fossil' onclick='TheApp.cgi.sendCommand("/json/wiki/get",{name:"Fossil"})' />
<input type='button' value='wiki/get/Fossil' onclick='TheApp.cgi.sendCommand("/json/wiki/get/Fossil")' />

<br/>

<input type='button' value='user/list' onclick='TheApp.cgi.sendCommand("/json/user/list")' />
<input type='button' value='user/get' onclick='TheApp.cgi.sendCommand("/json/user/get?name=anonymous")' />
<input type='button' value='tag/list' onclick='TheApp.cgi.sendCommand("/json/tag/list?includeTickets=false&raw=false")' />
<input type='button' value='tag/list/json' onclick='TheApp.cgi.sendCommand("/json/tag/list/json?raw=false")' />
<input type='button' value='tag/add'
    onclick='TheApp.cgi.sendCommand("/json/tag/add",{name:"json-add-tag-test",checkin:"json",value:"tag test",propagate:false,raw:false})' />
<input type='button' value='tag/cancel'
    onclick='TheApp.cgi.sendCommand("/json/tag/cancel",{name:"json-add-tag-test",checkin:"json",raw:false})' />
<input type='button' value='tag/find'
    onclick='TheApp.cgi.sendCommand("/json/tag/find",{name:"json",type:"*",raw:false,limit:5})' />

<br/>

<input type='button' value='diff'
    onclick='TheApp.cgi.sendCommand("/json/diff",{v1:"b0e9b45baed6f885",v2:"5f225e261d836287",context:2})' />
<input type='button' value='diff/A/B'
    onclick='TheApp.cgi.sendCommand("/json/diff/b0e9b45baed6f885/5f225e261d836287?context=2")' />

<input type='button' value='query'
    onclick='TheApp.cgi.sendCommand("/json/query?format=o","SELECT * from user")' />

<input type='button' value='report list'
    onclick='TheApp.cgi.sendCommand("/json/report/list")' />
<input type='button' value='report get'
    onclick='TheApp.cgi.sendCommand("/json/report/get",2)' />

<input type='button' value='report run'
    onclick='TheApp.cgi.sendCommand("/json/report/run",{"report":2,"format":"o"})' />

<!-- not yet ready...
<input type='button' value='artifact/XYZ' onclick='TheApp.cgi.sendCommand("/json/artifact?uuid=json")' />
-->

<!--
<input type='button' value='get whiki' onclick='TheApp.cgi.getPages("whiki")' />
<input type='button' value='get more' onclick='TheApp.cgi.getPages("HelloWorld/WhikiNews")' />
<input type='button' value='get client data' onclick='TheApp.cgi.getPageClientData("HelloWorld/whiki/WhikiCommands")' />
<input type='button' value='save client data' onclick='TheApp.cgi.savePageClientData({"HelloWorld":[1,3,5]})' />
-->
<hr/>
<b>Login:</b>
<br/>
<input type='button' value='Anon. PW' onclick='TheApp.cgi.sendCommand("/json/anonymousPassword")' />
<input type='button' value='Anon. PW+Login' onclick='TheApp.cgi.login()' />
<br/>
name:<input type='text' id='textUser' value='json-demo' size='12'/>
pw:<input type='password' id='textPassword' value='json-demo' size='12'/>
<input type='button' value='login' onclick='TheApp.cgi.login(jQuery("#textUser").val(),jQuery("#textPassword").val(),{onResponse:TheApp.onLogin})' />
<input type='button' value='logout' onclick='TheApp.cgi.logout()' />
<br/>
<span id='currentAuthToken' style='font-family:monospaced'></span>

<br/>

<hr/>

<table>
    <tr>
        <th>POST data</th>
        <th>Request AJAJ options</th>
    </tr>
    <tr>
        <td width='50%' valign='top'>
            <textarea id='taRequest' rows='10' cols='50'></textarea>
        </td>
        <td width='50%' valign='top'>
            <textarea id='taRequestOpt' rows='10' cols='40' readonly></textarea>
        </td>
    </tr>
    <tr>
        <th colspan='2'>Response <span id='timer'></span></th>
    </tr>
    <tr>
        <td colspan='2' id='responseContainer' valign='top'>
            <textarea id='taResponse' rows='20' cols='80' readonly></textarea>
        </td>
    </tr>
</table>
<div></div>
<div></div>
<div></div>

</body></html>

/**
    This file contains a WhAjaj extension for use with Fossil/JSON.

    Author: Stephan Beal (sgbeal@googlemail.com)

    License: Public Domain
*/

/**
    Constructor for a new Fossil AJAJ client. ajajOpt may be an optional
    object suitable for passing to the WhAjaj.Connector() constructor.
    
    On returning, this.ajaj is-a WhAjaj.Connector instance which can 
    be used to send requests to the back-end (though the convenience 
    functions of this class are the preferred way to do it). Clients 
    are encouraged to use FossilAjaj.sendCommand() (and friends) instead 
    of the underlying WhAjaj.Connector API, since this class' API 
    contains Fossil-specific request-calling handling (e.g. of authentication
    info) whereas WhAjaj is more generic.
*/
function FossilAjaj(ajajOpt)
{
    this.ajaj = new WhAjaj.Connector(ajajOpt);
    return this;
}

FossilAjaj.prototype.generateRequestId = function() {
    return this.ajaj.generateRequestId();
};

/**
   Proxy for this.ajaj.sendRequest().
*/
FossilAjaj.prototype.sendRequest = function(req,opt) {
    return this.ajaj.sendRequest(req,opt);
};

/**
    Sends a command to the fossil back-end. Command should be the
    path part of the URL, e.g. /json/stat, payload is a request-specific
    value type (may often be null/undefined). ajajOpt is an optional object
    holding WhAjaj.sendRequest()-compatible options.
    
    This function constructs a Fossil/JSON request envelope based
    on the given arguments and adds this.auth.authToken and a requestId
    to it.
*/
FossilAjaj.prototype.sendCommand = function(command, payload, ajajOpt) {
    var req;
    ajajOpt = ajajOpt || {};
    if(payload || (this.auth && this.auth.authToken) || ajajOpt.jsonp) {
        req = {
            payload:payload,
            requestId:('function' === typeof this.generateRequestId) ? this.generateRequestId() : undefined,
            authToken:(this.auth ? this.auth.authToken : undefined),
            jsonp:('string' === typeof ajajOpt.jsonp) ? ajajOpt.jsonp : undefined
        };
    }
    ajajOpt.method = req ? 'POST' : 'GET';
    // just for debuggering: ajajOpt.method = 'POST'; if(!req) req={};
    if(command) ajajOpt.url = this.ajaj.derivedOption('url',ajajOpt) + command;
    this.ajaj.sendRequest(req,ajajOpt);
};

/**
    Sends a login request to the back-end.

    ajajOpt is an optional configuration object suitable for passing 
    to sendCommand().

    After the response returns, this.auth will be
    set to the response payload.
    
    If name === 'anonymous' (the default if none is passed in) then this
    function ignores the pw argument and must make two requests - the first
    one gets the captcha code and the second one submits it.
    ajajOpt.onResponse() (if set) is only called for the actual login
    response (the 2nd one), as opposed to being called for both requests.
    However, this.ajaj.callbacks.onResponse() _is_ called for both (because
    it happens at a lower level).
    
    If this object has an onLogin() function it is called (with
    no arguments) before the onResponse() handler of the login is called
    (that is the 2nd request for anonymous logins).

*/
FossilAjaj.prototype.login = function(name,pw,ajajOpt) {
    name = name || 'anonymous';
    var self = this;
    var loginReq = {
        name:name,
        password:pw
    };
    ajajOpt = this.ajaj.normalizeAjaxParameters( ajajOpt || {} );
    var oldOnResponse = ajajOpt.onResponse;
    ajajOpt.onResponse = function(resp,req) {
        var thisOpt = this;
        //alert('login response:\n'+WhAjaj.stringify(resp));
        if( resp && resp.payload ) {
            //self.userName = resp.payload.name;
            //self.capabilities = resp.payload.capabilities;
            self.auth = resp.payload;
        }
        if( WhAjaj.isFunction( self.onLogin ) ){
            try{ self.onLogin(); }
            catch(e){}
        }
        if( WhAjaj.isFunction(oldOnResponse) ) {
            oldOnResponse.apply(thisOpt,[resp,req]);
        }
    };
    function doLogin(){
        //alert("Sending login request..."+WhAjaj.stringify(loginReq));
        self.sendCommand('/json/login', loginReq, ajajOpt);
    }
    if( 'anonymous' === name ){
      this.sendCommand('/json/anonymousPassword',undefined,{
          onResponse:function(resp,req){
/*
            if( WhAjaj.isFunction(oldOnResponse) ){
                oldOnResponse.apply(this, [resp,req]);
            };
*/
            if(resp && !resp.resultCode){
                //alert("Got PW. Trying to log in..."+WhAjaj.stringify(resp));
                loginReq.anonymousSeed = resp.payload.seed;
                loginReq.password = resp.payload.password;
                doLogin();
            }
          }
      });
    }
    else doLogin();
};

/**
    Logs out of fossil, invaliding this login token.

    ajajOpt is an optional configuration object suitable for passing 
    to sendCommand().
    
    If this object has an onLogout() function it is called (with
    no arguments) before the onResponse() handler is called.
    IFF the response succeeds then this.auth is unset.
*/
FossilAjaj.prototype.logout = function(ajajOpt) {
    var self = this;
    ajajOpt = this.ajaj.normalizeAjaxParameters( ajajOpt || {} );
    var oldOnResponse = ajajOpt.onResponse;
    ajajOpt.onResponse = function(resp,req) {
        var thisOpt = this;
        self.auth = undefined;
        if( WhAjaj.isFunction( self.onLogout ) ){
            try{ self.onLogout(); }
            catch(e){}
        }
        if( WhAjaj.isFunction(oldOnResponse) ) {
            oldOnResponse.apply(thisOpt,[resp,req]);
        }
    };
    this.sendCommand('/json/logout', undefined, ajajOpt );
};

/**
    Sends a HAI request to the server. /json/HAI is an alias /json/version.

    ajajOpt is an optional configuration object suitable for passing 
    to sendCommand().
*/
FossilAjaj.prototype.HAI = function(ajajOpt) {
    this.sendCommand('/json/HAI', undefined, ajajOpt);
};


/**
    Sends a /json/whoami request. Updates this.auth to contain
    the login info, removing them if the response does not contain
    that data.
*/
FossilAjaj.prototype.whoami = function(ajajOpt) {
    var self = this;
    ajajOpt = this.ajaj.normalizeAjaxParameters( ajajOpt || {} );
    var oldOnResponse = ajajOpt.onResponse;
    ajajOpt.onResponse = function(resp,req) {
        var thisOpt = this;
        if( resp && resp.payload ){
            if(!self.auth || (self.auth.authToken!==resp.payload.authToken)){
                self.auth = resp.payload;
                if( WhAjaj.isFunction(self.onLogin) ){
                    self.onLogin();
                }
            }
        }
        else { delete self.auth; }
        if( WhAjaj.isFunction(oldOnResponse) ) {
            oldOnResponse.apply(thisOpt,[resp,req]);
        }
    };
    self.sendCommand('/json/whoami', undefined, ajajOpt);
};

/**
    EXPERIMENTAL concrete WhAjaj.Connector.sendImpl() implementation which
    uses Rhino to connect to a local fossil binary for input and output. Its
    signature and semantics are as described for
    WhAjaj.Connector.prototype.sendImpl(), with a few exceptions and
    additions:

    - It does not support timeouts or asynchronous mode.

    - The args.fossilBinary property must point to the local fossil binary
    (it need not be a complete path if fossil is in the $PATH). This
    function throws (without calling any request callbacks) if
    args.fossilBinary is not set. fossilBinary may be set on
    WhAjaj.Connector.options.ajax, in the FossilAjaj constructor call, as
    the ajax options parameter to any of the FossilAjaj.sendCommand() family
    of functions, or by setting
    aFossilAjajInstance.ajaj.options.fossilBinary on a specific
    FossilAjaj instance.

    - It uses the args.url field to create the "command" property of the
    request, constructs a request envelope, spawns a fossil process in JSON
    mode, feeds it the request envelope, and returns the response envelope
    via the same mechanisms defined for the HTTP-based implementations.

    The interface is otherwise compatible with the "normal"
    FossilAjaj.sendCommand() front-end (it is, however, fossil-specific, and
    not back-end agnostic like the WhAjaj.sendImpl() interface intends).

    
*/
FossilAjaj.rhinoLocalBinarySendImpl = function(request,args){
    var self = this;
    request = request || {};
    if(!args.fossilBinary){
        throw new Error("fossilBinary is not set on AJAX options!");
    }
    var url = args.url.split('?')[0].split(/\/+/);
    if(url.length>1){
        // 3x shift(): protocol, host, 'json' part of path
        request.command = (url.shift(),url.shift(),url.shift(), url.join('/'));
    }
    delete args.url;
    //print("rhinoLocalBinarySendImpl SENDING: "+WhAjaj.stringify(request));    
    var json;
    try{
        var pargs = [args.fossilBinary, 'json', '--json-input', '-'];
        var p = java.lang.Runtime.getRuntime().exec(pargs);
        var outs = p.getOutputStream();
        var osr = new java.io.OutputStreamWriter(outs);
        var osb = new java.io.BufferedWriter(osr);
        
        json = JSON.stringify(request);
        osb.write(json,0, json.length);
        osb.close();
        var ins = p.getInputStream();
        var isr = new java.io.InputStreamReader(ins);
        var br = new java.io.BufferedReader(isr);
        var line;
        json = [];
        while( null !== (line=br.readLine())){
            json.push(line);
        }
        ins.close();
    }catch(e){
        args.errorMessage = e.toString();
        WhAjaj.Connector.sendHelper.onSendError.apply( self, [request, args] );
        return undefined;
    }
    json = json.join('');
    //print("READ IN JSON: "+json);
    WhAjaj.Connector.sendHelper.onSendSuccess.apply( self, [request, json, args] );
}/*rhinoLocalBinary*/

/*
    http://www.JSON.org/json2.js
    2009-06-29

    Public Domain.

    NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.

    See http://www.JSON.org/js.html

    This file creates a global JSON object containing two methods: stringify
    and parse.

        JSON.stringify(value, replacer, space)
            value       any JavaScript value, usually an object or array.

            replacer    an optional parameter that determines how object
                        values are stringified for objects. It can be a
                        function or an array of strings.

            space       an optional parameter that specifies the indentation
                        of nested structures. If it is omitted, the text will
                        be packed without extra whitespace. If it is a number,
                        it will specify the number of spaces to indent at each
                        level. If it is a string (such as '\t' or ' '),
                        it contains the characters used to indent at each level.

            This method produces a JSON text from a JavaScript value.

            When an object value is found, if the object contains a toJSON
            method, its toJSON method will be called and the result will be
            stringified. A toJSON method does not serialize: it returns the
            value represented by the name/value pair that should be serialized,
            or undefined if nothing should be serialized. The toJSON method
            will be passed the key associated with the value, and this will be
            bound to the object holding the key.

            For example, this would serialize Dates as ISO strings.

                Date.prototype.toJSON = function (key) {
                    function f(n) {
                        // Format integers to have at least two digits.
                        return n < 10 ? '0' + n : n;
                    }

                    return this.getUTCFullYear()   + '-' +
                         f(this.getUTCMonth() + 1) + '-' +
                         f(this.getUTCDate())      + 'T' +
                         f(this.getUTCHours())     + ':' +
                         f(this.getUTCMinutes())   + ':' +
                         f(this.getUTCSeconds())   + 'Z';
                };

            You can provide an optional replacer method. It will be passed the
            key and value of each member, with this bound to the containing
            object. The value that is returned from your method will be
            serialized. If your method returns undefined, then the member will
            be excluded from the serialization.

            If the replacer parameter is an array of strings, then it will be
            used to select the members to be serialized. It filters the results
            such that only members with keys listed in the replacer array are
            stringified.

            Values that do not have JSON representations, such as undefined or
            functions, will not be serialized. Such values in objects will be
            dropped; in arrays they will be replaced with null. You can use
            a replacer function to replace those with JSON values.
            JSON.stringify(undefined) returns undefined.

            The optional space parameter produces a stringification of the
            value that is filled with line breaks and indentation to make it
            easier to read.

            If the space parameter is a non-empty string, then that string will
            be used for indentation. If the space parameter is a number, then
            the indentation will be that many spaces.

            Example:

            text = JSON.stringify(['e', {pluribus: 'unum'}]);
            // text is '["e",{"pluribus":"unum"}]'


            text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
            // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'

            text = JSON.stringify([new Date()], function (key, value) {
                return this[key] instanceof Date ?
                    'Date(' + this[key] + ')' : value;
            });
            // text is '["Date(---current time---)"]'


        JSON.parse(text, reviver)
            This method parses a JSON text to produce an object or array.
            It can throw a SyntaxError exception.

            The optional reviver parameter is a function that can filter and
            transform the results. It receives each of the keys and values,
            and its return value is used instead of the original value.
            If it returns what it received, then the structure is not modified.
            If it returns undefined then the member is deleted.

            Example:

            // Parse the text. Values that look like ISO date strings will
            // be converted to Date objects.

            myData = JSON.parse(text, function (key, value) {
                var a;
                if (typeof value === 'string') {
                    a =
/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
                    if (a) {
                        return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
                            +a[5], +a[6]));
                    }
                }
                return value;
            });

            myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
                var d;
                if (typeof value === 'string' &&
                        value.slice(0, 5) === 'Date(' &&
                        value.slice(-1) === ')') {
                    d = new Date(value.slice(5, -1));
                    if (d) {
                        return d;
                    }
                }
                return value;
            });


    This is a reference implementation. You are free to copy, modify, or
    redistribute.

    This code should be minified before deployment.
    See http://javascript.crockford.com/jsmin.html

    USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
    NOT CONTROL.
*/

/*jslint evil: true */

/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
    call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
    lastIndex, length, parse, prototype, push, replace, slice, stringify,
    test, toJSON, toString, valueOf
*/

// Create a JSON object only if one does not already exist. We create the
// methods in a closure to avoid creating global variables.

var JSON = JSON || {};

(function () {

    function f(n) {
        // Format integers to have at least two digits.
        return n < 10 ? '0' + n : n;
    }

    if (typeof Date.prototype.toJSON !== 'function') {

        Date.prototype.toJSON = function (key) {

            return isFinite(this.valueOf()) ?
                   this.getUTCFullYear()   + '-' +
                 f(this.getUTCMonth() + 1) + '-' +
                 f(this.getUTCDate())      + 'T' +
                 f(this.getUTCHours())     + ':' +
                 f(this.getUTCMinutes())   + ':' +
                 f(this.getUTCSeconds())   + 'Z' : null;
        };

        String.prototype.toJSON =
        Number.prototype.toJSON =
        Boolean.prototype.toJSON = function (key) {
            return this.valueOf();
        };
    }

    var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        gap,
        indent,
        meta = {    // table of character substitutions
            '\b': '\\b',
            '\t': '\\t',
            '\n': '\\n',
            '\f': '\\f',
            '\r': '\\r',
            '"' : '\\"',
            '\\': '\\\\'
        },
        rep;


    function quote(string) {

// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.

        escapable.lastIndex = 0;
        return escapable.test(string) ?
            '"' + string.replace(escapable, function (a) {
                var c = meta[a];
                return typeof c === 'string' ? c :
                    '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
            }) + '"' :
            '"' + string + '"';
    }


    function str(key, holder) {

// Produce a string from holder[key].

        var i,          // The loop counter.
            k,          // The member key.
            v,          // The member value.
            length,
            mind = gap,
            partial,
            value = holder[key];

// If the value has a toJSON method, call it to obtain a replacement value.

        if (value && typeof value === 'object' &&
                typeof value.toJSON === 'function') {
            value = value.toJSON(key);
        }

// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.

        if (typeof rep === 'function') {
            value = rep.call(holder, key, value);
        }

// What happens next depends on the value's type.

        switch (typeof value) {
        case 'string':
            return quote(value);

        case 'number':

// JSON numbers must be finite. Encode non-finite numbers as null.

            return isFinite(value) ? String(value) : 'null';

        case 'boolean':
        case 'null':

// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce 'null'. The case is included here in
// the remote chance that this gets fixed someday.

            return String(value);

// If the type is 'object', we might be dealing with an object or an array or
// null.

        case 'object':

// Due to a specification blunder in ECMAScript, typeof null is 'object',
// so watch out for that case.

            if (!value) {
                return 'null';
            }

// Make an array to hold the partial results of stringifying this object value.

            gap += indent;
            partial = [];

// Is the value an array?

            if (Object.prototype.toString.apply(value) === '[object Array]') {

// The value is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.

                length = value.length;
                for (i = 0; i < length; i += 1) {
                    partial[i] = str(i, value) || 'null';
                }

// Join all of the elements together, separated with commas, and wrap them in
// brackets.

                v = partial.length === 0 ? '[]' :
                    gap ? '[\n' + gap +
                            partial.join(',\n' + gap) + '\n' +
                                mind + ']' :
                          '[' + partial.join(',') + ']';
                gap = mind;
                return v;
            }

// If the replacer is an array, use it to select the members to be stringified.

            if (rep && typeof rep === 'object') {
                length = rep.length;
                for (i = 0; i < length; i += 1) {
                    k = rep[i];
                    if (typeof k === 'string') {
                        v = str(k, value);
                        if (v) {
                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
                        }
                    }
                }
            } else {

// Otherwise, iterate through all of the keys in the object.

                for (k in value) {
                    if (Object.hasOwnProperty.call(value, k)) {
                        v = str(k, value);
                        if (v) {
                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
                        }
                    }
                }
            }

// Join all of the member texts together, separated with commas,
// and wrap them in braces.

            v = partial.length === 0 ? '{}' :
                gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' +
                        mind + '}' : '{' + partial.join(',') + '}';
            gap = mind;
            return v;
        }
    }

// If the JSON object does not yet have a stringify method, give it one.

    if (typeof JSON.stringify !== 'function') {
        JSON.stringify = function (value, replacer, space) {

// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.

            var i;
            gap = '';
            indent = '';

// If the space parameter is a number, make an indent string containing that
// many spaces.

            if (typeof space === 'number') {
                for (i = 0; i < space; i += 1) {
                    indent += ' ';
                }

// If the space parameter is a string, it will be used as the indent string.

            } else if (typeof space === 'string') {
                indent = space;
            }

// If there is a replacer, it must be a function or an array.
// Otherwise, throw an error.

            rep = replacer;
            if (replacer && typeof replacer !== 'function' &&
                    (typeof replacer !== 'object' ||
                     typeof replacer.length !== 'number')) {
                throw new Error('JSON.stringify');
            }

// Make a fake root object containing our value under the key of ''.
// Return the result of stringifying the value.

            return str('', {'': value});
        };
    }


// If the JSON object does not yet have a parse method, give it one.

    if (typeof JSON.parse !== 'function') {
        JSON.parse = function (text, reviver) {

// The parse method takes a text and an optional reviver function, and returns
// a JavaScript value if the text is a valid JSON text.

            var j;

            function walk(holder, key) {

// The walk method is used to recursively walk the resulting structure so
// that modifications can be made.

                var k, v, value = holder[key];
                if (value && typeof value === 'object') {
                    for (k in value) {
                        if (Object.hasOwnProperty.call(value, k)) {
                            v = walk(value, k);
                            if (v !== undefined) {
                                value[k] = v;
                            } else {
                                delete value[k];
                            }
                        }
                    }
                }
                return reviver.call(holder, key, value);
            }


// Parsing happens in four stages. In the first stage, we replace certain
// Unicode characters with escape sequences. JavaScript handles many characters
// incorrectly, either silently deleting them, or treating them as line endings.

            cx.lastIndex = 0;
            if (cx.test(text)) {
                text = text.replace(cx, function (a) {
                    return '\\u' +
                        ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
                });
            }

// In the second stage, we run the text against regular expressions that look
// for non-JSON patterns. We are especially concerned with '()' and 'new'
// because they can cause invocation, and '=' because it can cause mutation.
// But just to be safe, we want to reject all unexpected forms.

// We split the second stage into 4 regexp operations in order to work around
// crippling inefficiencies in IE's and Safari's regexp engines. First we
// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
// replace all simple value tokens with ']' characters. Third, we delete all
// open brackets that follow a colon or comma or that begin the text. Finally,
// we look to see that the remaining characters are only whitespace or ']' or
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.

            if (/^[\],:{}\s]*$/.
test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

// In the third stage we use the eval function to compile the text into a
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
// in JavaScript: it can begin a block or an object literal. We wrap the text
// in parens to eliminate the ambiguity.

                j = eval('(' + text + ')');

// In the optional fourth stage, we recursively walk the new structure, passing
// each name/value pair to a reviver function for possible transformation.

                return typeof reviver === 'function' ?
                    walk({'': j}, '') : j;
            }

// If the text is not JSON parseable, then a SyntaxError is thrown.

            throw new SyntaxError('JSON.parse');
        };
    }
}());

/**
    This file provides a JS interface into the core functionality of
    JSON-centric back-ends. It sends GET or JSON POST requests to
    a back-end and expects JSON responses. The exact semantics of
    the underlying back-end and overlying front-end are not its concern,
    and it leaves the interpretation of the data up to the client/server
    insofar as possible.

    All functionality is part of a class named WhAjaj, and that class
    acts as namespace for this framework.

    Author: Stephan Beal (http://wanderinghorse.net/home/stephan/)

    License: Public Domain
    
    This framework is directly derived from code originally found in 
    http://code.google.com/p/jsonmessage, and later in 
    http://whiki.wanderinghorse.net, where it contained quite a bit 
    of application-specific logic. It was eventually (the 3rd time i 
    needed it) split off into its own library to simplify inclusion 
    into my many mini-projects.
*/


/**
    The WhAjaj function is primarily a namespace, and not intended 
    to called or instantiated via the 'new' operator.
*/
function WhAjaj()
{
}

/** Returns a millisecond Unix Epoch timestamp. */
WhAjaj.msTimestamp = function()
{
    return (new Date()).getTime();
};

/** Returns a Unix Epoch timestamp (in seconds) in integer format.

    Reminder to self: (1.1 %1.2) evaluates to a floating-point value 
    in JS, and thus this implementation is less than optimal.
*/
WhAjaj.unixTimestamp = function()
{
    var ts = (new Date()).getTime();
    return parseInt( ""+((ts / 1000) % ts) );
};

/**
    Returns true if v is-a Array instance.
*/
WhAjaj.isArray = function( v )
{
    return (v &&
            (v instanceof Array) ||
            (Object.prototype.toString.call(v) === "[object Array]")
            );
    /* Reminders to self:
        typeof [] == "object"
        toString.call([]) == "[object Array]"
        ([]).toString() == empty
    */
};

/**
    Returns true if v is-a Object instance.
*/
WhAjaj.isObject = function( v )
{
    return v &&
        (v instanceof Object) &&
        ('[object Object]' === Object.prototype.toString.apply(v) );
};

/**
    Returns true if v is-a Function instance.
*/
WhAjaj.isFunction = function(obj)
{
    return obj
    && (
    (obj instanceof Function)
    || ('function' === typeof obj)
    || ("[object Function]" === Object.prototype.toString.call(obj))
    )
    ;
};

/**
    Parses window.location.search-style string into an object
    containing key/value pairs of URL arguments (already urldecoded).
    
    If the str argument is not passed (arguments.length==0) then 
    window.location.search.substring(1) is used by default. If 
    neither str is passed in nor window exists then false is returned.

    On success it returns an Object containing the key/value pairs
    parsed from the string.
    
    FIXME: for keys in the form "name[]", build an array of results,
    like PHP does.
 
*/
WhAjaj.processUrlArgs = function(str) {
    if( 0 === arguments.length ) {
        if( (undefined === typeof window) ||
            !window.location ||
            !window.location.search )  return false;
        else str = (''+window.location.search).substring(1);
    }
    if( ! str ) return false;
    var args = {};
    var sp = str.split(/&+/);
    var rx = /^([^=]+)(=(.+))?/;
    var i, m;
    for( i in sp ) {
        m = rx.exec( sp[i] );
        if( ! m ) continue;
        args[decodeURIComponent(m[1])] = (m[3] ? decodeURIComponent(m[3]) : true);
    }
    return args;
};

/**
    A simple wrapper around JSON.stringify(), using my own personal
    preferred values for the 2nd and 3rd parameters. To globally
    set its indentation level, assign WhAjaj.stringify.indent to
    an integer value (0 for no intendation).
    
    This function is intended only for human-readable output, not
    generic over-the-wire JSON output (where JSON.stringify(val) will
    produce smaller results).
*/
WhAjaj.stringify = function(val) {
    if( ! arguments.callee.indent ) arguments.callee.indent = 4;
    return JSON.stringify(val,0,arguments.callee.indent);
};

/**
    Each instance of this class holds state information for making 
    AJAJ requests to a back-end system. While clients may use one 
    "requester" object per connection attempt, for connections to the
    same back-end, using an instance configured for that back-end 
    can simplify usage. This class is designed so that the actual 
    connection-related details (i.e. _how_ it connects to the 
    back-end) may be re-implemented to use a client's preferred 
    connection mechanism (e.g. jQuery).
    
    The optional opt paramater may be an object with any (or all) of 
    the properties documented for WhAjaj.Connector.options.ajax. 
    Properties set here (or later via modification of the "options" 
    property of this object) will be used in calls to 
    WhAjaj.Connector.sendRequest(), and these override (normally) any
    options set in WhAjaj.Connector.options.ajax. Note that 
    WhAjaj.Connector.sendRequest() _also_ takes an options object, 
    and ones passed there will override, for purposes of that one 
    request, any options passed in here or defined in 
    WhAjaj.Connector.options.ajax. See WhAjaj.Connector.options.ajax
    and WhAjaj.Connector.prototype.sendRequest() for more details
    about the precedence of options.
    
    Sample usage:
    
    @code
    // Set up common connection-level options:
    var cgi = new WhAjaj.Connector({
        url: '/cgi-bin/my.cgi',
        timeout:10000,
        onResponse(resp,req) { alert(JSON.stringify(resp,0.4)); },
        onError(req,opt) {
            alert(opt.errorMessage);
        }
    });
    // Any of those options may optionally be set globally in
    // WhAjaj.Connector.options.ajax (onError(), beforeSend(), and afterSend()
    // are often easiest/most useful to set globally).

    // Get list of pages...
    cgi.sendRequest( null, {
        onResponse(resp,req){ alert(WhAjaj.stringify(resp)); }
    });
    @endcode

    For common request types, clients can add functions to this
    object which act as wrappers for backend-specific functionality. As
    a simple example:
    
    @code
    cgi.login = function(name,pw,ajajOpt) {
        this.sendRequest( {name:name, password:pw}, ajajOpt );
    };
    @endcode
    
    TODOs:
    
    - Caching of page-load requests, with a configurable lifetime.
    
    - Use-cases like the above login() function are a tiny bit 
    problematic to implement when each request has a different URL 
    path (i know this from the whiki implementation). This is partly 
    a side-effect of design descisions made back in the very first 
    days of this code's life. i need to go through and see where i 
    can bend those conventions a bit (where it won't break my other 
    apps unduly).
*/
WhAjaj.Connector = function(opt)
{
    if(WhAjaj.isObject(opt)) this.options = opt;
    //TODO?: this.$cache = {};
};

/**
    The core options used by WhAjaj.Connector instances for performing
    network operations. These options can (and some _should_)
    be changed by a client application. They can also be changed
    on specific instances of WhAjaj.Connector, but for most applications
    it is simpler to set them here and not have to bother with configuring
    each WhAjaj.Connector instance. Apps which use multiple back-ends at one time,
    however, will need to customize each instance for a given back-end.
*/
WhAjaj.Connector.options = {
    /**
        A (meaningless) prefix to apply to WhAjaj.Connector-generated
        request IDs.
    */
    requestIdPrefix:'WhAjaj.Connector-',
    /**
        Default options for WhAjaj.Connector.sendRequest() connection 
        parameters. This object holds only connection-related 
        options and callbacks (all optional), and not options 
        related to the required JSON structure of any given request. 
        i.e. the page name used in a get-page request are not set 
        here but are specified as part of the request object.

        These connection options are a "normalized form" of options 
        often found in various AJAX libraries like jQuery, 
        Prototype, dojo, etc. This approach allows us to swap out 
        the real connection-related parts by writing a simple proxy 
        which transforms our "normalized" form to the 
        backend-specific form. For examples, see the various 
        implementations stored in WhAjaj.Connector.sendImpls.

        The following callback options are, in practice, almost 
        always set globally to some app-wide defaults:

        - onError() to report errors using a common mechanism.
        - beforeSend() to start a visual activity notification
        - afterSend() to disable the visual activity notification

        However, be aware that if any given WhAjaj.Connector instance is 
        given its own before/afterSend callback then those will 
        override these. Mixing shared/global and per-instance
        callbacks can potentially lead to confusing results if, e.g.,
        the beforeSend() and afterSend() functions have side-effects
        but are not used with their proper before/after partner.
        
        TODO: rename this to 'ajaj' (the name is historical). The 
        problem with renaming it is is that the word 'ajax' is 
        pretty prevelant in the source tree, so i can't globally 
        swap it out.
    */
    ajax: {
        /**
            URL of the back-end server/CGI.
        */
        url: '/some/path',

        /**
            Connection method. Some connection-related functions might
            override any client-defined setting.
            
            Must be one of 'GET' or 'POST'. For custom connection 
            implementation, it may optionally be some 
            implementation-specified value.

            Normally the API can derive this value automatically - if the
            request uses JSON data it is POSTed, else it is GETted.
        */
        method:'GET',

        /**
            A hint whether to run the operation asynchronously or 
            not. Not all concrete WhAjaj.Connector.sendImpl() 
            implementations can support this. Interestingly, at 
            least one popular AJAX toolkit does not document 
            supporting _synchronous_ AJAX operations. All common 
            browser-side implementations support async operation, but 
            non-browser implementations migth not.
        */
        asynchronous:true,

        /**
            A HTTP authentication login name for the AJAX 
            connection. Not all concrete WhAjaj.Connector.sendImpl() 
            implementations can support this.
        */
        loginName:undefined,

        /**
            An HTTP authentication login password for the AJAJ 
            connection. Not all concrete WhAjaj.Connector.sendImpl() 
            implementations can support this.
        */
        loginPassword:undefined,

        /**
            A connection timeout, in milliseconds, for establishing 
            an AJAJ connection. Not all concrete 
            WhAjaj.Connector.sendImpl() implementations can support this.
        */
        timeout:10000,

        /**
            If an AJAJ request receives JSON data from the back-end, that
            data is passed as a plain Object as the response parameter
            (exception: in jsonp mode it is passed a string). The initiating
            request object is passed as the second parameter, but clients
            can normally ignore it (only those which need a way to map
            specific requests to responses will need it). The 3rd parameter
            is the same as the 'this' object for the context of the callback,
            but is provided because the instance-level callbacks (set in
            (WhAjaj.Connector instance).callbacks, require it in some
            cases (because their 'this' is different!).
            
            Note that the response might contain error information which
            comes from the back-end. The difference between this error info
            and the info passed to the onError() callback is that this data
            indicates an application-level error, whereas onError() is used
            to report connection-level problems or when the backend produces
            non-JSON data (which, when not in jsonp mode, is unexpected and
            is as fatal to the request as a connection error).
        */
        onResponse: function(response, request, opt){},

        /**
            If an AJAX request fails to establish a connection or it 
            receives non-JSON data from the back-end, this function 
            is called (e.g. timeout error or host name not 
            resolvable). It is passed the originating request and the
            "normalized" connection parameters used for that 
            request. The connectOpt object "should" (or "might") 
            have an "errorMessage" property which describes the 
            nature of the problem.
            
            Clients will almost always want to replace the default 
            implementation with something which integrates into 
            their application.
        */
        onError: function(request, connectOpt)
        {
            alert('AJAJ request failed:\n'
                +'Connection information:\n'
                +JSON.stringify(connectOpt,0,4)
            );
        },

        /**
            Called before each connection attempt is made. Clients 
            can use this to, e.g.,  enable a visual "network activity
            notification" for the user. It is passed the original 
            request object and the normalized connection parameters 
            for the request. If this function changes opt, those 
            changes _are_ applied to the subsequent request. If this 
            function throws, neither the onError() nor afterSend() 
            callbacks are triggered and WhAjaj.Connector.sendImpl() 
            propagates the exception back to the caller.
        */
        beforeSend: function(request,opt){},

        /**
            Called after an AJAJ connection attempt completes, 
            regardless of success or failure. Passed the same 
            parameters as beforeSend() (see that function for 
            details).
            
            Here's an example of setting up a visual notification on 
            ajax operations using jQuery (but it's also easy to do 
            without jQuery as well):
            
            @code
            function startAjaxNotif(req,opt) {
                var me = arguments.callee;
                var c = ++me.ajaxCount;
                me.element.text( c + " pending AJAX operation(s)..." );
                if( 1 == c ) me.element.stop().fadeIn();
            }
            startAjaxNotif.ajaxCount = 0.
            startAjaxNotif.element = jQuery('#whikiAjaxNotification');
            
            function endAjaxNotif() {
                var c = --startAjaxNotif.ajaxCount;
                startAjaxNotif.element.text( c+" pending AJAX operation(s)..." );
                if( 0 == c ) startAjaxNotif.element.stop().fadeOut();
            }
            @endcode

            Set the beforeSend/afterSend properties to those 
            functions to enable the notifications by default.            
        */
        afterSend: function(request,opt){},

        /**
            If jsonp is a string then the WhAjaj-internal response
            handling code ASSUMES that the response contains a JSONP-style
            construct and eval()s it after afterSend() but before onResponse().
            In this case, onResponse() will get a string value for the response
            instead of a response object parsed from JSON. 
        */
        jsonp:undefined,
        /**
            Don't use yet. Planned future option.
        */
        propagateExceptions:false
    }
};


/**
    WhAjaj.Connector.prototype.callbacks defines callbacks analog
    to the onXXX callbacks defined in WhAjaj.Connector.options.ajax,
    with two notable differences:

    1) these callbacks, if set, are called in addition to any
    request-specific callback. The intention is to allow a framework to set
    "framework-level" callbacks which should be called independently of the
    request-specific callbacks (without interfering with them, e.g.
    requiring special re-forwarding features).

    2) The 'this' object in these callbacks is the Connector instance
    associated with the callback, whereas the "other" onXXX form has its
    "ajax options" object as its this.

    When this API says that an onXXX callback will be called for a request,
    both the request's onXXX (if set) and this one (if set) will be called.
*/
WhAjaj.Connector.prototype.callbacks = {};
/**
    Instance-specific values for AJAJ-level properties (as opposed to
    application-level request properties). Options set here "override" those
    specified in WhAjaj.Connector.options.ajax and are "overridden" by
    options passed to sendRequest().
*/
WhAjaj.Connector.prototype.options = {};


/**
    Tries to find the given key in any of the following, returning
    the first match found: opt, this.options, WhAjaj.Connector.options.ajax.

    Returns undefined if key is not found.
*/
WhAjaj.Connector.prototype.derivedOption = function(key,opt) {
    var v = opt ? opt[key] : undefined;
    if( undefined !== v ) return v;
    else v = this.options[key];
    if( undefined !== v ) return v;
    else v = WhAjaj.Connector.options.ajax[key];
    return v;
};

/**
    Returns a unique string on each call containing a generic 
    reandom request identifier string. This is not used by the core 
    API but can be used by client code to generate unique IDs for 
    each request (if needed).

    The exact format is unspecified and may change in the future.

    Request IDs can be used by clients to "match up" responses to 
    specific requests if needed. In practice, however, they are 
    seldom, if ever, needed. When passing several concurrent 
    requests through the same response callback, it might be useful 
    for some clients to be able to distinguish, possibly re-routing 
    them through other handlers based on the originating request type.
    
    If this.options.requestIdPrefix or 
    WhAjaj.Connector.options.requestIdPrefix is set then that text
    is prefixed to the returned string.
*/
WhAjaj.Connector.prototype.generateRequestId = function()
{
    if( undefined === arguments.callee.sequence )
    {
        arguments.callee.sequence = 0;
    }
    var pref = this.options.requestIdPrefix || WhAjaj.Connector.options.requestIdPrefix || '';
    return pref +
        WhAjaj.msTimestamp() +
        '/'+(Math.round( Math.random() * 100000000) )+
        ':'+(++arguments.callee.sequence);
};

/**
    Copies (SHALLOWLY) all properties in opt to this.options.
*/
WhAjaj.Connector.prototype.addOptions = function(opt) {
    var k, v;
    for( k in opt ) {
        if( ! opt.hasOwnProperty(k) ) continue /* proactive Prototype kludge! */;
        this.options[k] = opt[k];
    }
    return this.options;
};

/**
    An internal helper object which holds several functions intended 
    to simplify the creation of concrete communication channel 
    implementations for WhAjaj.Connector.sendImpl(). These operations
    take care of some of the more error-prone parts of ensuring that
    onResponse(), onError(), etc. callbacks are called consistently 
    using the same rules.
*/
WhAjaj.Connector.sendHelper = {
    /**
        opt is assumed to be a normalized set of 
        WhAjaj.Connector.sendRequest() options. This function 
        creates a url by concatenating opt.url and some form of 
        opt.urlParam.
        
        If opt.urlParam is an object or string then it is appended 
        to the url. An object is assumed to be a one-dimensional set 
        of simple (urlencodable) key/value pairs, and not larger 
        data structures. A string value is assumed to be a 
        well-formed, urlencoded set of key/value pairs separated by 
        '&' characters.
        
        The new/normalized URL is returned (opt is not modified). If 
        opt.urlParam is not set then opt.url is returned (or an 
        empty string if opt.url is itself a false value).
        
        TODO: if opt is-a Object and any key points to an array, 
        build up a list of keys in the form "keyname[]". We could 
        arguably encode sub-objects like "keyname[subkey]=...", but 
        i don't know if that's conventions-compatible with other 
        frameworks.
    */
    normalizeURL: function(opt) {
        var u = opt.url || '';
        if( opt.urlParam ) {
            var addQ = (u.indexOf('?') >= 0) ? false : true;
            var addA = addQ ? false : ((u.indexOf('&')>=0) ? true : false);
            var tail = '';
            if( WhAjaj.isObject(opt.urlParam) ) {
                var li = [], k;
                for( k in opt.urlParam) {
                    li.push( k+'='+encodeURIComponent( opt.urlParam[k] ) );
                }
                tail = li.join('&');
            }
            else if( 'string' === typeof opt.urlParam ) {
                tail = opt.urlParam;
            }
            u = u + (addQ ? '?' : '') + (addA ? '&' : '') + tail;
        }
        return u;
    },
    /**
        Should be called by WhAjaj.Connector.sendImpl() 
        implementations after a response has come back. This 
        function takes care of most of ensuring that framework-level 
        conventions involving WhAjaj.Connector.options.ajax 
        properties are followed.
        
        The request argument must be the original request passed to 
        the sendImpl() function. It may legally be null for GET requests.
        
        The opt object should be the normalized AJAX options used 
        for the connection.
        
        The resp argument may be either a plain Object or a string 
        (in which case it is assumed to be JSON).

        The 'this' object for this call MUST be a WhAjaj.Connector
        instance in order for callback processing to work properly.
        
        This function takes care of the following:
        
        - Calling opt.afterSend()
        
        - If resp is a string, de-JSON-izing it to an object.
        
        - Calling opt.onResponse()
        
        - Calling opt.onError() in several common (potential) error 
        cases.

        - If resp is-a String and opt.jsonp then resp is assumed to be
        a JSONP-form construct and is eval()d BEFORE opt.onResponse()
        is called. It is arguable to eval() it first, but the logic
        integrates better with the non-jsonp handler.

        The sendImpl() should return immediately after calling this.
        
        The sendImpl() must call only one of onSendSuccess() or 
        onSendError(). It must call one of them or it must implement 
        its own response/error handling, which is not recommended 
        because getting the documented semantics of the 
        onError/onResponse/afterSend handling correct can be tedious.
    */
    onSendSuccess:function(request,resp,opt) {
        var cb = this.callbacks || {};
        if( WhAjaj.isFunction(cb.afterSend) ) {
            try {cb.afterSend( request, opt );}
            catch(e){}
        }
        if( WhAjaj.isFunction(opt.afterSend) ) {
            try {opt.afterSend( request, opt );}
            catch(e){}
        }
        function doErr(){
            if( WhAjaj.isFunction(cb.onError) ) {
                try {cb.onError( request, opt );}
                catch(e){}
            }
            if( WhAjaj.isFunction(opt.onError) ) {
                try {opt.onError( request, opt );}
                catch(e){}
            }
        }
        if( ! resp ) {
            opt.errorMessage = "Sending of request succeeded but returned no data!";
            doErr();
            return false;
        }

        if( 'string' === typeof resp ) {
            try {
                resp = opt.jsonp ? eval(resp) : JSON.parse(resp);
            } catch(e) {
                opt.errorMessage = e.toString();
                doErr();
                return;
            }
        }
        try {
            if( WhAjaj.isFunction( cb.onResponse  ) ) {
                cb.onResponse( resp, request, opt );
            }
            if( WhAjaj.isFunction( opt.onResponse  ) ) {
                opt.onResponse( resp, request, opt );
            }
            return true;
        }
        catch(e) {
            opt.errorMessage = "Exception while handling inbound JSON response:\n"
                + e
                +"\nOriginal response data:\n"+JSON.stringify(resp,0,2)
                ;
            ;
            doErr();
            return false;
        }
    },
   /**
        Should be called by sendImpl() implementations after a response
        has failed to connect (e.g. could not resolve host or timeout
        reached). This function takes care of most of ensuring that
        framework-level conventions involving WhAjaj.Connector.options.ajax
        properties are followed.
        
        The request argument must be the original request passed to 
        the sendImpl() function. It may legally be null for GET 
        requests.

        The 'this' object for this call MUST be a WhAjaj.Connector
        instance in order for callback processing to work properly.
        
        The opt object should be the normalized AJAX options used 
        for the connection. By convention, the caller of this 
        function "should" set opt.errorMessage to contain a 
        human-readable description of the error.
        
        The sendImpl() should return immediately after calling this. The
        return value from this function is unspecified.
    */
    onSendError: function(request,opt) {
        var cb = this.callbacks || {};
        if( WhAjaj.isFunction(cb.afterSend) ) {
            try {cb.afterSend( request, opt );}
            catch(e){}
        }
        if( WhAjaj.isFunction(opt.afterSend) ) {
            try {opt.afterSend( request, opt );}
            catch(e){}
        }
        if( WhAjaj.isFunction( cb.onError ) ) {
            try {cb.onError( request, opt );}
            catch(e) {/*ignore*/}
        }
        if( WhAjaj.isFunction( opt.onError ) ) {
            try {opt.onError( request, opt );}
            catch(e) {/*ignore*/}
        }
    }
};

/**
    WhAjaj.Connector.sendImpls holds several concrete 
    implementations of WhAjaj.Connector.prototype.sendImpl(). To use 
    a specific implementation by default assign 
    WhAjaj.Connector.prototype.sendImpl to one of these functions.
    
    The functions defined here require that the 'this' object be-a
    WhAjaj.Connector instance.
    
    Historical notes:

    a) We once had an implementation based on Prototype, but that 
    library just pisses me off (they change base-most types' 
    prototypes, introducing side-effects in client code which 
    doesn't even use Prototype). The Prototype version at the time 
    had a serious toJSON() bug which caused empty arrays to 
    serialize as the string "[]", which broke a bunch of my code. 
    (That has been fixed in the mean time, but i don't use 
    Prototype.)
    
    b) We once had an implementation for the dojo library, 
    
    If/when the time comes to add Prototype/dojo support, we simply
    need to port:
    
    http://code.google.com/p/jsonmessage/source/browse/trunk/lib/JSONMessage/JSONMessage.inc.js
    
    (search that file for "dojo" and "Prototype") to this tree. That 
    code is this code's generic grandfather and they are still very 
    similar, so a port is trivial.    
    
*/
WhAjaj.Connector.sendImpls = {
    /**
        This is a concrete implementation of 
        WhAjaj.Connector.prototype.sendImpl() which uses the 
        environment's native XMLHttpRequest class to send whiki 
        requests and fetch the responses.

        The only argument must be a connection properties object, as 
        constructed by WhAjaj.Connector.normalizeAjaxParameters().

        If window.firebug is set then window.firebug.watchXHR() is 
        called to enable monitoring of the XMLHttpRequest object.

        This implementation honors the loginName and loginPassword 
        connection parameters.

        Returns the XMLHttpRequest object.

        This implementation requires that the 'this' object be-a 
        WhAjaj.Connector.
        
        This implementation uses setTimeout() to implement the 
        timeout support, and thus the JS engine must provide that 
        functionality.
    */
    XMLHttpRequest: function(request, args)
    {
        var json = WhAjaj.isObject(request) ? JSON.stringify(request) : request;
        var xhr = new XMLHttpRequest();
        var startTime = (new Date()).getTime();
        var timeout = args.timeout || 10000/*arbitrary!*/;
        var hitTimeout = false;
        var done = false;
        var tmid /* setTimeout() ID */;
        var whself = this;
        //if( json ) json = json.replace(/ö/g,"\\u00f6") /* ONLY FOR A SPECIFIC TEST */;
        //alert( 'json=\n'+json );
        function handleTimeout()
        {
            hitTimeout = true;
            if( ! done )
            {
                var now = (new Date()).getTime();
                try { xhr.abort(); } catch(e) {/*ignore*/}
                // see: http://www.w3.org/TR/XMLHttpRequest/#the-abort-method
                args.errorMessage = "Timeout of "+timeout+"ms reached after "+(now-startTime)+"ms during AJAX request.";
                WhAjaj.Connector.sendHelper.onSendError.apply( whself, [request, args] );
            }
            return;
        }
        function onStateChange()
        { // reminder to self: apparently 'this' is-not-a XHR :/
            if( hitTimeout )
            { /* we're too late - the error was already triggered. */
                return;
            }

            if( 4 == xhr.readyState )
            {
                done = true;
                if( tmid )
                {
                    clearTimeout( tmid );
                    tmid = null;
                }
                if( (xhr.status >= 200) && (xhr.status < 300) )
                {
                    WhAjaj.Connector.sendHelper.onSendSuccess.apply( whself, [request, xhr.responseText, args] );
                    return;
                }
                else
                {
                    if( undefined === args.errorMessage )
                    {
                        args.errorMessage = "Error sending a '"+args.method+"' AJAX request to "
                                +"["+args.url+"]: "
                                +"Status text=["+xhr.statusText+"]"
                            ;
                        WhAjaj.Connector.sendHelper.onSendError.apply( whself, [request, args] );
                    }
                    else { /*maybe it was was set by the timeout handler. */ }
                    return;
                }
            }
        };

        xhr.onreadystatechange = onStateChange;
        if( ('undefined'!==(typeof window)) && ('firebug' in window) && ('watchXHR' in window.firebug) )
        { /* plug in to firebug lite's XHR monitor... */
            window.firebug.watchXHR( xhr );
        }
        try
        {
            //alert( JSON.stringify( args  ));
            function xhrOpen()
            {
                if( ('loginName' in args) && args.loginName )
                {
                    xhr.open( args.method, args.url, args.asynchronous, args.loginName, args.loginPassword );
                }
                else
                {
                    xhr.open( args.method, args.url, args.asynchronous  );
                }
            }
            if( json && ('POST' ===  args.method.toUpperCase()) )
            {
                xhrOpen();
                xhr.setRequestHeader("Content-Type", "application/json; charset=utf-8");
                // Google Chrome warns that it refuses to set these
                // "unsafe" headers (his words, not mine):
                // xhr.setRequestHeader("Content-length", json.length);
                // xhr.setRequestHeader("Connection", "close");
                xhr.send( json );
            }
            else /* assume GET */
            {
                xhrOpen();
                xhr.send(null);
            }
            tmid = setTimeout( handleTimeout, timeout );
            return xhr;
        }
        catch(e)
        {
            args.errorMessage = e.toString();
            WhAjaj.Connector.sendHelper.onSendError.apply( whself, [request, args] );
            return undefined;
        }
    }/*XMLHttpRequest()*/,
    /**
        This is a concrete implementation of 
        WhAjaj.Connector.prototype.sendImpl() which uses the jQuery 
        AJAX API to send requests and fetch the responses.

        The first argument may be either null/false, an Object 
        containing toJSON-able data to post to the back-end, or such an
        object in JSON string form.

        The second argument must be a connection properties object, as 
        constructed by WhAjaj.Connector.normalizeAjaxParameters().

        If window.firebug is set then window.firebug.watchXHR() is 
        called to enable monitoring of the XMLHttpRequest object.

        This implementation honors the loginName and loginPassword 
        connection parameters.

        Returns the XMLHttpRequest object.

        This implementation requires that the 'this' object be-a 
        WhAjaj.Connector.
    */
    jQuery:function(request,args)
    {
        var data = request || undefined;
        var whself = this;
        if( data ) {
            if('string'!==typeof data) {
                try {
                    data = JSON.stringify(data);
                }
                catch(e) {
                    WhAjaj.Connector.sendHelper.onSendError.apply( whself, [request, args] );
                    return;
                }
            }
        }
        var ajopt = {
            url: args.url,
            data: data,
            type: args.method,
            async: args.asynchronous,
            password: (undefined !== args.loginPassword) ? args.loginPassword : undefined,
            username: (undefined !== args.loginName) ? args.loginName : undefined,
            contentType: 'application/json; charset=utf-8',
            error: function(xhr, textStatus, errorThrown)
            {
                //this === the options for this ajax request
                args.errorMessage = "Error sending a '"+ajopt.type+"' request to ["+ajopt.url+"]: "
                        +"Status text=["+textStatus+"]"
                        +(errorThrown ? ("Error=["+errorThrown+"]") : "")
                    ;
                WhAjaj.Connector.sendHelper.onSendError.apply( whself, [request, args] );
            },
            success: function(data)
            {
                WhAjaj.Connector.sendHelper.onSendSuccess.apply( whself, [request, data, args] );
            },
            /* Set dataType=text instead of json to keep jQuery from doing our carefully
                written response handling for us.
            */
            dataType: 'text'
        };
        if( undefined !== args.timeout )
        {
            ajopt.timeout = args.timeout;
        }
        try
        {
            return jQuery.ajax(ajopt);
        }
        catch(e)
        {
            args.errorMessage = e.toString();
            WhAjaj.Connector.sendHelper.onSendError.apply( whself, [request, args] );
            return undefined;
        }
    }/*jQuery()*/,
    /**
        This is a concrete implementation of 
        WhAjaj.Connector.prototype.sendImpl() which uses the rhino 
        Java API to send requests and fetch the responses.

        Limitations vis-a-vis the interface:

        - timeouts are not supported.

        - asynchronous mode is not supported because implementing it
        requires the ability to kill a running thread (which is deprecated
        in the Java API).

        TODOs:

        - add socket timeouts.

        - support HTTP proxy.

        The Java APIs support this, it just hasn't been added here yet.
    */
    rhino:function(request,args)
    {
        var self = this;
        var data = request || undefined;
        if( data ) {
            if('string'!==typeof data) {
                try {
                    data = JSON.stringify(data);
                }
                catch(e) {
                    WhAjaj.Connector.sendHelper.onSendError.apply( self, [request, args] );
                    return;
                }
            }
        }
        var url;
        var con;
        var IO = new JavaImporter(java.io);
        var wr;
        var rd, ln, json = [];
        function setIncomingCookies(list){
            if(!list || !list.length) return;
            if( !self.cookies ) self.cookies = {};
            var k, v, i;
            for( i = 0; i < list.length; ++i ){
                v = list[i].split('=',2);
                k = decodeURIComponent(v[0])
                v = v[0] ? decodeURIComponent(v[0].split(';',2)[0]) : null;
                //print("RECEIVED COOKIE: "+k+"="+v);
                if(!v) {
                    delete self.cookies[k];
                    continue;
                }else{
                    self.cookies[k] = v;
                }
            }
        };
        function setOutboundCookies(conn){
            if(!self.cookies) return;
            var k, v;
            for( k in self.cookies ){
                if(!self.cookies.hasOwnProperty(k)) continue /*kludge for broken JS libs*/;
                v = self.cookies[k];
                conn.addRequestProperty("Cookie", encodeURIComponent(k)+'='+encodeURIComponent(v));
                //print("SENDING COOKIE: "+k+"="+v);
            }
        };
        try{
            url = new java.net.URL( args.url )
            con = url.openConnection(/*FIXME: add proxy support!*/);
            con.setRequestProperty("Accept-Charset","utf-8");
            setOutboundCookies(con);
            if(data){
                con.setRequestProperty("Content-Type","application/json; charset=utf-8");
                con.setDoOutput( true );
                wr = new IO.OutputStreamWriter(con.getOutputStream())
                wr.write(data);
                wr.flush();
                wr.close();
                wr = null;
                //print("POSTED: "+data);
            }
            rd = new IO.BufferedReader(new IO.InputStreamReader(con.getInputStream()));
            //var skippedHeaders = false;
            while ((line = rd.readLine()) !== null) {
                //print("LINE: "+line);
                //if(!line.length && !skippedHeaders){
                //    skippedHeaders = true;
                // json = [];
                //    continue;
                //}
                json.push(line);
            }
            setIncomingCookies(con.getHeaderFields().get("Set-Cookie"));
        }catch(e){
            args.errorMessage = e.toString();
            WhAjaj.Connector.sendHelper.onSendError.apply( self, [request, args] );
            return undefined;
        }
        try { if(wr) wr.close(); } catch(e) { /*ignore*/}
        try { if(rd) rd.close(); } catch(e) { /*ignore*/}
        json = json.join('');
        //print("READ IN JSON: "+json);
        WhAjaj.Connector.sendHelper.onSendSuccess.apply( self, [request, json, args] );
    }/*rhino*/
};

/**
    An internal function which takes an object containing properties 
    for a WhAjaj.Connector network request. This function creates a new 
    object containing a superset of the properties from:

    a) opt
    b) this.options
    c) WhAjaj.Connector.options.ajax

    in that order, using the first one it finds.

    All non-function properties are _deeply_ copied via JSON cloning 
    in order to prevent accidental "cross-request pollenation" (been 
    there, done that). Functions cannot be cloned and are simply 
    copied by reference.
    
    This function throws if JSON-copying one of the options fails
    (e.g. due to cyclic data structures).
    
    Reminder to self: this function does not "normalize" opt.urlParam
    by encoding it into opt.url, mainly for historical reasons, but
    also because that behaviour was specifically undesirable in this
    code's genetic father.
*/
WhAjaj.Connector.prototype.normalizeAjaxParameters = function (opt)
{
    var rc = {};
    function merge(k,v)
    {
        if( rc.hasOwnProperty(k) ) return;
        else if( WhAjaj.isFunction(v) ) {}
        else if( WhAjaj.isObject(v) ) v = JSON.parse( JSON.stringify(v) );
        rc[k]=v;
    }
    function cp(obj) {
        if( ! WhAjaj.isObject(obj) ) return;
        var k;
        for( k in obj ) {
            if( ! obj.hasOwnProperty(k) ) continue /* i will always hate the Prototype designers for this. */;
            merge(k, obj[k]);
        }
    }
    cp( opt );
    cp( this.options );
    cp( WhAjaj.Connector.options.ajax );
    // no, not here: rc.url = WhAjaj.Connector.sendHelper.normalizeURL(rc);
    return rc;
};

/**
    This is the generic interface for making calls to a back-end 
    JSON-producing request handler. It is a simple wrapper around 
    WhAjaj.Connector.prototype.sendImpl(), which just normalizes the 
    connection options for sendImpl() and makes sure that 
    opt.beforeSend() is (possibly) called.
    
    The request parameter must either be false/null/empty or a 
    fully-populated JSON-able request object (which will be sent as 
    unencoded application/json text), depending on the type of 
    request being made. It is never semantically legal (in this API) 
    for request to be a string/number/true/array value. As a rule, 
    only POST requests use the request data. GET requests should 
    encode their data in opt.url or opt.urlParam (see below).
    
    opt must contain the network-related parameters for the request. 
    Paramters _not_ set in opt are pulled from this.options or 
    WhAjaj.Connector.options.ajax (in that order, using the first 
    value it finds). Thus the set of connection-level options used 
    for the request are a superset of those various sources.
    
    The "normalized" (or "superimposed") opt object's URL may be 
    modified before the request is sent, as follows:

    if opt.urlParam is a string then it is assumed to be properly 
    URL-encoded parameters and is appended to the opt.url. If it is 
    an Object then it is assumed to be a one-dimensional set of 
    key/value pairs with simple values (numbers, strings, booleans, 
    null, and NOT objects/arrays). The keys/values are URL-encoded 
    and appended to the URL.

    The beforeSend() callback (see below) can modify the options
    object before the request attempt is made.
   
    The callbacks in the normalized opt object will be triggered as
    follows (if they are set to Function values):
    
    - beforeSend(request,opt) will be called before any network 
    processing starts. If beforeSend() throws then no other 
    callbacks are triggered and this function propagates the 
    exception. This function is passed normalized connection options
    as its second parameter, and changes this function makes to that
    object _will_ be used for the pending connection attempt.
    
    - onError(request,opt) will be called if a connection to the 
    back-end cannot be established. It will be passed the original 
    request object (which might be null, depending on the request 
    type) and the normalized options object. In the error case, the 
    opt object passed to onError() "should" have a property called 
    "errorMessage" which contains a description of the problem.
    
    - onError(request,opt) will also be called if connection 
    succeeds but the response is not JSON data.
    
    - onResponse(response,request) will be called if the response 
    returns JSON data. That data might hold an error response code - 
    clients need to check for that. It is passed the response object 
    (a plain object) and the original request object.
    
    - afterSend(request,opt) will be called directly after the
    AJAX request is finished, before onError() or onResonse() are
    called. Possible TODO: we explicitly do NOT pass the response to
    this function in order to keep the line between the responsibilities
    of the various callback clear (otherwise this could be used the same
    as onResponse()). In practice it would sometimes be useful have the
    response passed to this function, mainly for logging/debugging
    purposes.

    The return value from this function is meaningless because
    AJAX operations tend to take place asynchronously.

*/
WhAjaj.Connector.prototype.sendRequest = function(request,opt)
{
    if( !WhAjaj.isFunction(this.sendImpl) )
    {
        throw new Error("This object has no sendImpl() member function! I don't know how to send the request!");
    }
    var ex = false;
    var av = Array.prototype.slice.apply( arguments, [0] );
    
    /**
        FIXME: how to handle the error, vis-a-vis- the callbacks, if 
        normalizeAjaxParameters() throws? It can throw if 
        (de)JSON-izing fails.
    */
    var norm = this.normalizeAjaxParameters( WhAjaj.isObject(opt) ? opt : {} );
    norm.url = WhAjaj.Connector.sendHelper.normalizeURL(norm);
    if( ! request ) norm.method = 'GET';
    var cb = this.callbacks || {};
    if( this.callbacks && WhAjaj.isFunction(this.callbacks.beforeSend) ) {
        this.callbacks.beforeSend( request, norm );
    }
    if( WhAjaj.isFunction(norm.beforeSend) ){
        norm.beforeSend( request, norm );
    }
    //alert( WhAjaj.stringify(request)+'\n'+WhAjaj.stringify(norm));
    try { this.sendImpl( request, norm ); }
    catch(e) { ex = e; }
    if(ex) throw ex;
};

/**
    sendImpl() holds a concrete back-end connection implementation. It
    can be replaced with a custom implementation if one follows the rules
    described throughout this API. See WhAjaj.Connector.sendImpls for
    the concrete implementations included with this API.
*/
//WhAjaj.Connector.prototype.sendImpl = WhAjaj.Connector.sendImpls.XMLHttpRequest;
//WhAjaj.Connector.prototype.sendImpl = WhAjaj.Connector.sendImpls.rhino;
//WhAjaj.Connector.prototype.sendImpl = WhAjaj.Connector.sendImpls.jQuery;

if( 'undefined' !== typeof jQuery ){
    WhAjaj.Connector.prototype.sendImpl = WhAjaj.Connector.sendImpls.jQuery;
}
else {
    WhAjaj.Connector.prototype.sendImpl = WhAjaj.Connector.sendImpls.XMLHttpRequest;
}

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

<head>
	<title>Fossil/JSON Wiki Editor Prototype</title>
	<meta http-equiv="content-type" content="text/html;charset=utf-8" />
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> 
    <script type="text/javascript" src="js/whajaj.js"></script>
    <script type="text/javascript" src="js/fossil-ajaj.js"></script>

<style type='text/css'>
th {
  text-align: left;
  background-color: #ececec;  
}

.dangerWillRobinson {
    background-color: yellow;
}

.wikiPageLink {
    text-decoration: underline;
}
</style>

<script type='text/javascript'>
WhAjaj.Connector.options.ajax.url =
/*
    Change this to your CGI/server root path:
*/
     //'http://fjson/cgi-bin/fossil.cgi'
     //'/repos/fossil-sgb/json.cgi'
    '/cgi-bin/fossil-json.cgi'
     ;
var TheApp = {
      response:null,
      sessionID:null,
      jqe:{}/*jqe==jQuery Elements*/,
      ajaxCount:0,
      cgi: new FossilAjaj(),
      pages:{}
};


TheApp.startAjaxNotif = function()
{
    ++this.ajaxCount;
    TheApp.jqe.responseContainer.removeClass('dangerWillRobinson');
    this.jqe.ajaxNotification.attr( 'title', this.ajaxCount+" pending AJAX operation(s)..." );
    if( 1 == this.ajaxCount ) this.jqe.ajaxNotification.fadeIn();
};

TheApp.endAjaxNotif = function()
{
    --this.ajaxCount;
    this.jqe.ajaxNotification.attr( 'title', this.ajaxCount+" pending AJAX operation(s)..." );
    if( 0 == this.ajaxCount ) this.jqe.ajaxNotification.fadeOut();
};

TheApp.responseContainsError = function(resp) {
    if( !resp || resp.resultCode ) {
        //alert("Error response:\n"+JSON.stringify(resp,0,4));
        TheApp.jqe.taResponse.val( "RESPONSE CONTAINS ERROR INFO:\n"+WhAjaj.stringify(resp) );
        //TheApp.jqe.responseContainer.css({backgroundColor:'yellow'});
        //TheApp.jqe.responseContainer.addClass('dangerWillRobinson');
        TheApp.jqe.responseContainer.flash( '255,0,0', 1500 );
        return true;
    }
    return false;
};


TheApp.sendRequest = function() {
    var path = this.jqe.textPath.val();
    var self = this;
    var data = this.jqe.pageListArea.val();
    var doPost = (data && data.length);
    var req;
    if( doPost ) try {
        req = JSON.parse(data);
    }
    catch(e) {
        TheApp.jqe.taResponse.val("Request is not valid JSON.\n"+e);
        return;
    }
    if( req ) {
        req.requestId = this.cgi.generateRequestId();
    }
    var self = this;
    var opt = {
        url: WhAjaj.Connector.options.ajax.url + path,
        method: doPost ? 'POST' : 'GET'
    };
    this.cgi.sendRequest( req, opt );
};
jQuery.fn.animateHighlight = function(highlightColor, duration) {
    var highlightBg = highlightColor || "#FFFF9C";
    var animateMs = duration || 1500;
    var originalBg = this.css("backgroundColor");
    this.stop().css("background-color", highlightBg).animate({backgroundColor: originalBg}, animateMs);
};
jQuery.fn.flash = function( color, duration )
{
    var current = this.css( 'color' );
    this.animate( { color: 'rgb(' + color + ')' }, duration / 2);
    this.animate( { color: current }, duration / 2 );
};

jQuery(document).ready(function(){
    var ids = [
        'btnSend',
        'ajaxNotification',
        'currentAuthToken',
        'responseContainer',
        'spanPageName',
        'pageListArea',
        'taPageContent',
        'taResponse',
        'textPath', // list of HTML element IDs we use often.
        'timer'
    ];
    var i, k;
    for( i = 0; i < ids.length; ++i ) {
        k = ids[i];
        TheApp.jqe[k] = jQuery('#'+k);
    }
    TheApp.jqe.textPath.
        keyup(function(event){
            if(event.keyCode == 13){
                TheApp.sendRequest();
            }
        });
    TheApp.timer = {
        _tstart:0,_tend:0,duration:0,
        start:function(){
            this._tstart = (new Date()).getTime();
        },
        end:function(){
            this._tend = (new Date()).getTime();
            return this.duration = this._tend - this._tstart;
        }
    };
    var ajcb = TheApp.cgi.ajaj.callbacks;
    ajcb.beforeSend = TheApp.beforeSend = function(req,opt) {
        TheApp.timer.start();
        var val =
            req ?
            (('string'===typeof req) ? req : WhAjaj.stringify(req))
            : '';
        TheApp.jqe.taResponse.val('');
        TheApp.startAjaxNotif();
    };
    ajcb.afterSend = TheApp.afterSend = function(req,opt) {
        TheApp.timer.end();
        TheApp.endAjaxNotif();
        TheApp.jqe.timer.text( "(Round-trip time: "+TheApp.timer.duration+'ms)' );
    };
    ajcb.onResponse = TheApp.onResponse = function(resp,req) {
        var val;
        try {
            val = WhAjaj.stringify(resp);
        }
        catch(e) {
            val = WhAjaj.stringify(e)
        }
        if(resp.resultCode){
            alert("Response contains error info:\n"+val);
        }
        TheApp.jqe.taResponse.val( val );
    };
    ajcb.onError = function(req,opt) {
        TheApp.jqe.taResponse.val( "ERROR SENDING REQUEST:\n"+WhAjaj.stringify(opt) );
    };

    TheApp.jqe.taPageContent.blur(function(){
        var p = TheApp.currentPage;
        if(! p ) return;
        p.content = TheApp.jqe.taPageContent.val();
    });

    TheApp.cgi.onLogin = function(){
      TheApp.jqe.taResponse.val( "Logged in: "+WhAjaj.stringify(this.auth));
      TheApp.jqe.currentAuthToken.text("Logged in: "+WhAjaj.stringify(this.auth));
    };
    TheApp.cgi.onLogout = function(){
      TheApp.jqe.taResponse.val( "Logged out!" );
      TheApp.jqe.currentAuthToken.text("");
    };

    TheApp.showPage = function(name){
        function doShow(page){
            TheApp.currentPage = page;
            TheApp.jqe.spanPageName.text('('+page.name+')');
            TheApp.jqe.taPageContent.val(page.content);
        }
        var p = ('object' === typeof name) ? name : TheApp.pages[name];
        if(('object' === typeof p) && p.content) {
            doShow(p);
            return;
        }
        TheApp.cgi.sendCommand('/json/wiki/get',{
            name:name
        },{
            onResponse:function(resp,req){
                TheApp.onResponse(resp,req);
                if(resp.resultCode) return;
                var p = resp.payload;
                doShow( TheApp.pages[p.name] = p );
            }
        });
    };
    TheApp.refreshPageListView = function(){
        var list = (function(){
            var k, v, li = [];
            for( k in TheApp.pages ){
                if(!TheApp.pages.hasOwnProperty(k)) continue;
                li.push(k);
            }
            return li;                
        })();
        var i, p, a, tgt = TheApp.jqe.pageListArea;
        tgt.text('');
        function makeLink(name){
            var link = jQuery('<span></span>');
            link.text(name);
            link.addClass('wikiPageLink');
            link.click(function(e){
                TheApp.showPage(name);
                e.preventDefault();
                return false;
            });
            return link;
        }
        list.sort();
        for( i = 0; i < list.length; ++i ){
            tgt.append(makeLink(list[i]));
            tgt.append('<br/>');
        }
    };

    TheApp.loadPageList = function(){
        TheApp.cgi.sendCommand('/json/wiki/list',null,{
            onResponse:function(resp,req){
                TheApp.onResponse(resp,req);
                if(resp.resultCode) return;
                var i, v, p, ar = resp.payload;
                for( i = 0; i < ar.length; ++i ){
                    v = ar[i];
                    p = TheApp.pages[v];
                    if( !p ) TheApp.pages[v] = {name:v};
                }
                TheApp.refreshPageListView();
            }
        });
        return false /*for click handlers*/;
    }

    TheApp.savePage = function(p){
        p = p || TheApp.currentPage;
        if( 'object' !== typeof p ){
            p = TheApp.pages[p];
        }
        if('object' !== typeof p){
            alert("savePage() argument is not a page object or known page name.");
        }
        TheApp.pages[p.name] = p;
        p.content = TheApp.jqe.taPageContent.val();
        var req = {
            name:p.name,
            content:p.content
        };
        if(! confirm("Really save wiki page ["+p.name+"]?") ) return;
        TheApp.cgi.sendCommand('/json/wiki/'+(p.isNew?'create':'save'),req,{
            onResponse:function(resp,req){
                TheApp.onResponse(resp,req);
                if(resp.resultCode) return;
                delete p.isNew;
                p.timestamp = resp.payload.timestamp;
            }
        });
        
    };

    TheApp.createNewPage = function(){
        var name = prompt("New page name?");
        if(!name) return;
        var p = {
            name:name,
            content:"New, empty page.",
            isNew:true
        };
        TheApp.pages[name] = p;
        TheApp.refreshPageListView();
        TheApp.showPage(p);
/*
        if(! confirm("Really create new wiki page ["+name+"]?") ) return;
        TheApp.cgi.sendCommand('/json/wiki/create',req,{
            onResponse:function(resp,req){
                TheApp.onResponse(resp,req);
                if(resp.resultCode) return;
                TheApp.pages[p.name] = p;
                TheApp.refreshPageListView();
            }
        });
*/
    };

    TheApp.cgi.whoami();

});

</script>

</head>

<body>
<span id='ajaxNotification'></span>
<h1>PROTOTYPE JSON-based Fossil Wiki Editor</h1>

See also: <a href='index.html'>main test page</a>.

<br>
<b>Login:</b>
<br/>
<input type='button' value='Anon. Login' onclick='TheApp.cgi.login()' />
or: 
name:<input type='text' id='textUser' value='json-demo' size='12'/>
pw:<input type='password' id='textPassword' value='json-demo' size='12'/>
<input type='button' value='login' onclick='TheApp.cgi.login(jQuery("#textUser").val(),jQuery("#textPassword").val(),{onResponse:TheApp.onLogin})' />
<input type='button' value='logout' onclick='TheApp.cgi.logout()' />

<br/>
<span id='currentAuthToken' style='font-family:monospaced'></span>

<hr/>
<strong>Quick-posts:</strong><br/>
<input type='button' value='HAI' onclick='TheApp.cgi.HAI()' />
<input type='button' value='stat' onclick='TheApp.cgi.sendCommand("/json/stat")' />
<input type='button' value='whoami' onclick='TheApp.cgi.whoami()' />
<input type='button' value='wiki/list' onclick='TheApp.loadPageList()' />
<!--
<input type='button' value='timeline/ci' onclick='TheApp.cgi.sendCommand("/json/timeline/ci")' />
-->

<!--
<input type='button' value='get whiki' onclick='TheApp.cgi.getPages("whiki")' />
<input type='button' value='get more' onclick='TheApp.cgi.getPages("HelloWorld/WhikiNews")' />
<input type='button' value='get client data' onclick='TheApp.cgi.getPageClientData("HelloWorld/whiki/WhikiCommands")' />
<input type='button' value='save client data' onclick='TheApp.cgi.savePageClientData({"HelloWorld":[1,3,5]})' />
-->
<hr/>

<table>
    <tr>
        <th>Page List</th>
        <th>Content <span id='spanPageName'></span></th>
    </tr>
    <tr>
        <td width='25%' valign='top'>
            <input type='button' value='Create new...' onclick='TheApp.createNewPage()' /><br/>
            <div id='pageListArea'></div>
        </td>
        <td width='75%' valign='top'>
            <input type='button' value='Save' onclick='TheApp.savePage()' /><br/>
            <textarea id='taPageContent' rows='20' cols='60'></textarea>
        </td>
    </tr>
    <tr>
        <th colspan='2'>Response <span id='timer'></span></th>
    </tr>
    <tr>
        <td colspan='2' id='responseContainer'>
            <textarea id='taResponse' rows='20' cols='80' readonly></textarea>
        </td>
    </tr>
</table>
<div></div>
<div></div>
<div></div>

</body></html>

                         => {Look for openssl in the given path, or auto or none}
    with-zlib:path       => {Look for zlib in the given path}
    with-tcl:path        => {Enable Tcl integration, with Tcl in the specified path}
    internal-sqlite=1    => {Don't use the internal sqlite, use the system one}
    static=0             => {Link a static executable}
    lineedit=1           => {Disable line editing}
    fossil-debug=0       => {Build with fossil debugging enabled}

}

# sqlite wants these types if possible
cc-with {-includes {stdint.h inttypes.h}} {
    cc-check-types uint32_t uint16_t int16_t uint8_t
}

................................................................................

  find_internal_sqlite
}

if {[opt-bool fossil-debug]} {
    define-append EXTRA_CFLAGS -DFOSSIL_DEBUG
}





if {[opt-bool static]} {
    # XXX: This will not work on all systems.
    define-append EXTRA_LDFLAGS -static
}

                         => {Look for openssl in the given path, or auto or none}
    with-zlib:path       => {Look for zlib in the given path}
    with-tcl:path        => {Enable Tcl integration, with Tcl in the specified path}
    internal-sqlite=1    => {Don't use the internal sqlite, use the system one}
    static=0             => {Link a static executable}
    lineedit=1           => {Disable line editing}
    fossil-debug=0       => {Build with fossil debugging enabled}
    json=0        => {Build with fossil JSON API enabled}
}

# sqlite wants these types if possible
cc-with {-includes {stdint.h inttypes.h}} {
    cc-check-types uint32_t uint16_t int16_t uint8_t
}

................................................................................

  find_internal_sqlite
}

if {[opt-bool fossil-debug]} {
    define-append EXTRA_CFLAGS -DFOSSIL_DEBUG
}

if {[opt-bool json]} {
    define-append EXTRA_CFLAGS -DFOSSIL_ENABLE_JSON
}

if {[opt-bool static]} {
    # XXX: This will not work on all systems.
    define-append EXTRA_LDFLAGS -static
}

all:
	$(MAKE) -C ..

        if( z[i]=='"' ) z[i] = '_';
      }
      return;
    }
  }
  blob_append(pBlob, zIn, -1);
}

        if( z[i]=='"' ) z[i] = '_';
      }
      return;
    }
  }
  blob_append(pBlob, zIn, -1);
}

/*
** A read(2)-like impl for the Blob class. Reads (copies) up to nLen
** bytes from pIn, starting at position pIn->iCursor, and copies them
** to pDest (which must be valid memory at least nLen bytes long).
**
** Returns the number of bytes read/copied, which may be less than
** nLen (if end-of-blob is encountered).
**
** Updates pIn's cursor.
** 
** Returns 0 if pIn contains no data.
*/
unsigned int blob_read(Blob *pIn, void * pDest, unsigned int nLen ){
  if( !pIn->aData || (pIn->iCursor >= pIn->nUsed) ){
    return 0;
  } else if( (pIn->iCursor + nLen) > (unsigned int)pIn->nUsed ){
    nLen = (unsigned int) (pIn->nUsed - pIn->iCursor);
  }
  assert( pIn->nUsed > pIn->iCursor );
  assert( (pIn->iCursor+nLen)  <= pIn->nUsed );
  if( nLen ){
    memcpy( pDest, pIn->aData, nLen );
    pIn->iCursor += nLen;
  }
  return nLen;
}

  db_end_transaction(0);
  
  /* Do an autosync push, if requested */
  if( !isPrivate ) autosync(AUTOSYNC_PUSH);
}

/*
** Prepare a query that will list all branches.




*/
static void prepareBranchQuery(Stmt *pQuery, int showAll, int showClosed){
  if( showClosed ){


    db_prepare(pQuery,
      "SELECT value FROM tagxref"
      " WHERE tagid=%d AND value NOT NULL "
      "EXCEPT "
      "SELECT value FROM tagxref"
      " WHERE tagid=%d"
      "   AND rid IN leaf"
      "   AND NOT %z"
      " ORDER BY value COLLATE nocase /*sort*/",
      TAG_BRANCH, TAG_BRANCH, leaf_is_closed_sql("tagxref.rid")
    );
  }else if( showAll ){
    db_prepare(pQuery,
      "SELECT DISTINCT value FROM tagxref"
      " WHERE tagid=%d AND value NOT NULL"
      "   AND rid IN leaf"
      " ORDER BY value COLLATE nocase /*sort*/",
      TAG_BRANCH
    );
................................................................................
    int showClosed = find_option("closed",0,0)!=0;

    if( g.localOpen ){
      vid = db_lget_int("checkout", 0);
      zCurrent = db_text(0, "SELECT value FROM tagxref"
                            " WHERE rid=%d AND tagid=%d", vid, TAG_BRANCH);
    }
    prepareBranchQuery(&q, showAll, showClosed);
    while( db_step(&q)==SQLITE_ROW ){
      const char *zBr = db_column_text(&q, 0);
      int isCur = zCurrent!=0 && fossil_strcmp(zCurrent,zBr)==0;
      fossil_print("%s%s\n", (isCur ? "* " : "  "), zBr);
    }
    db_finalize(&q);
  }else{
................................................................................
  @ <div class="sideboxDescribed"><a href="leaves?closed">
  @ closed leaves</a></div>.
  @ Closed branches are fixed and do not change (unless they are first
  @ reopened)</li>
  @ </ol>
  style_sidebox_end();

  prepareBranchQuery(&q, showAll, showClosed);
  cnt = 0;
  while( db_step(&q)==SQLITE_ROW ){
    const char *zBr = db_column_text(&q, 0);
    if( cnt==0 ){
      if( colorTest ){
        @ <h2>Default background colors for all branches:</h2>
      }else if( showAll ){

  db_end_transaction(0);
  
  /* Do an autosync push, if requested */
  if( !isPrivate ) autosync(AUTOSYNC_PUSH);
}

/*
** Prepare a query that will list branches.
**
** If (which<0) then the query pulls only closed branches. If
** (which>0) then the query pulls all (closed and opened)
** branches. Else the query pulls currently-opened branches.
*/


void branch_prepare_list_query(Stmt *pQuery, int which ){
  if( which < 0 ){
    db_prepare(pQuery,
      "SELECT value FROM tagxref"
      " WHERE tagid=%d AND value NOT NULL "
      "EXCEPT "
      "SELECT value FROM tagxref"
      " WHERE tagid=%d"
      "   AND rid IN leaf"
      "   AND NOT %z"
      " ORDER BY value COLLATE nocase /*sort*/",
      TAG_BRANCH, TAG_BRANCH, leaf_is_closed_sql("tagxref.rid")
    );
  }else if( which>0 ){
    db_prepare(pQuery,
      "SELECT DISTINCT value FROM tagxref"
      " WHERE tagid=%d AND value NOT NULL"
      "   AND rid IN leaf"
      " ORDER BY value COLLATE nocase /*sort*/",
      TAG_BRANCH
    );
................................................................................
    int showClosed = find_option("closed",0,0)!=0;

    if( g.localOpen ){
      vid = db_lget_int("checkout", 0);
      zCurrent = db_text(0, "SELECT value FROM tagxref"
                            " WHERE rid=%d AND tagid=%d", vid, TAG_BRANCH);
    }
    branch_prepare_list_query(&q, showAll?1:(showClosed?-1:0));
    while( db_step(&q)==SQLITE_ROW ){
      const char *zBr = db_column_text(&q, 0);
      int isCur = zCurrent!=0 && fossil_strcmp(zCurrent,zBr)==0;
      fossil_print("%s%s\n", (isCur ? "* " : "  "), zBr);
    }
    db_finalize(&q);
  }else{
................................................................................
  @ <div class="sideboxDescribed"><a href="leaves?closed">
  @ closed leaves</a></div>.
  @ Closed branches are fixed and do not change (unless they are first
  @ reopened)</li>
  @ </ol>
  style_sidebox_end();

  branch_prepare_list_query(&q, showAll?1:(showClosed?-1:0));
  cnt = 0;
  while( db_step(&q)==SQLITE_ROW ){
    const char *zBr = db_column_text(&q, 0);
    if( cnt==0 ){
      if( colorTest ){
        @ <h2>Default background colors for all branches:</h2>
      }else if( showAll ){

  sqlite3_randomness(sizeof(x), &x);
  x &= 0x7fffffff;
  return x;
}

/*
** Translate a captcha seed value into the captcha password string.


*/
char *captcha_decode(unsigned int seed){
  const char *zSecret;
  const char *z;
  Blob b;
  static char zRes[20];

  zSecret = db_get("captcha-secret", 0);
  if( zSecret==0 ){

  sqlite3_randomness(sizeof(x), &x);
  x &= 0x7fffffff;
  return x;
}

/*
** Translate a captcha seed value into the captcha password string.
** The returned string is static and overwritten on each call to
** this function.
*/
char const *captcha_decode(unsigned int seed){
  const char *zSecret;
  const char *z;
  Blob b;
  static char zRes[20];

  zSecret = db_get("captcha-secret", 0);
  if( zSecret==0 ){

    }else{
      if( *z ){ *z++ = 0; }
      zValue = "";
    }
    if( fossil_islower(zName[0]) ){
      cgi_set_parameter_nocopy(zName, zValue);
    }



  }
}

/*
** *pz is a string that consists of multiple lines of text.  This
** routine finds the end of the current line of text and converts
** the "\n" or "\r\n" that ends that line into a "\000".  It then
................................................................................
            cgi_set_parameter_nocopy(mprintf("%s:mimetype",zName), z);
          }
        }
      }
    }
  }        
}



/*












































































** Initialize the query parameter database.  Information is pulled from
** the QUERY_STRING environment variable (if it exists), from standard
** input if there is POST data, and from HTTP_COOKIE.
*/
void cgi_init(void){
  char *z;
  const char *zType;
  int len;




  cgi_destination(CGI_BODY);







  z = (char*)P("QUERY_STRING");
  if( z ){
    z = mprintf("%s",z);
    add_param_list(z, '&');
  }

  z = (char*)P("REMOTE_ADDR");

  if( z ) g.zIpAddr = mprintf("%s", z);


  len = atoi(PD("CONTENT_LENGTH", "0"));
  g.zContentType = zType = P("CONTENT_TYPE");
  if( len>0 && zType ){
    blob_zero(&g.cgiIn);
    if( fossil_strcmp(zType,"application/x-www-form-urlencoded")==0 
         || strncmp(zType,"multipart/form-data",19)==0 ){
................................................................................
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
      blob_uncompress(&g.cgiIn, &g.cgiIn);
    }else if( fossil_strcmp(zType, "application/x-fossil-debug")==0 ){
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
    }else if( fossil_strcmp(zType, "application/x-fossil-uncompressed")==0 ){
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
    }







  }




  z = (char*)P("HTTP_COOKIE");
  if( z ){
    z = mprintf("%s",z);


    add_param_list(z, ';');
  }










}

/*
** This is the comparison function used to sort the aParamQP[] array of
** query parameters and cookies.
*/
static int qparam_compare(const void *a, const void *b){
................................................................................

/*
** Panic and die while processing a webpage.
*/
NORETURN void cgi_panic(const char *zFormat, ...){
  va_list ap;
  cgi_reset_content();












  cgi_set_status(500, "Internal Server Error");
  cgi_printf(
    "<html><body><h1>Internal Server Error</h1>\n"
    "<plaintext>"
  );
  va_start(ap, zFormat);
  vxprintf(pContent,zFormat,ap);
  va_end(ap);
  cgi_reply();
  fossil_exit(1);

}

/*
** Remove the first space-delimited token from a string and return
** a pointer to it.  Add a NULL to the string to terminate the token.
** Make *zLeftOver point to the start of the next token.
*/
................................................................................
*/
void cgi_handle_http_request(const char *zIpAddr){
  char *z, *zToken;
  int i;
  struct sockaddr_in remoteName;
  socklen_t size = sizeof(struct sockaddr_in);
  char zLine[2000];     /* A single line of input. */

  g.fullHttpReply = 1;
  if( fgets(zLine, sizeof(zLine),g.httpIn)==0 ){
    malformed_request();
  }
  zToken = extract_token(zLine, &z);
  if( zToken==0 ){
    malformed_request();

    }else{
      if( *z ){ *z++ = 0; }
      zValue = "";
    }
    if( fossil_islower(zName[0]) ){
      cgi_set_parameter_nocopy(zName, zValue);
    }
#ifdef FOSSIL_ENABLE_JSON
    json_setenv( zName, cson_value_new_string(zValue,strlen(zValue)) );
#endif /* FOSSIL_ENABLE_JSON */
  }
}

/*
** *pz is a string that consists of multiple lines of text.  This
** routine finds the end of the current line of text and converts
** the "\n" or "\r\n" that ends that line into a "\000".  It then
................................................................................
            cgi_set_parameter_nocopy(mprintf("%s:mimetype",zName), z);
          }
        }
      }
    }
  }        
}


#ifdef FOSSIL_ENABLE_JSON
/*
** Internal helper for cson_data_source_FILE_n().
*/
typedef struct CgiPostReadState_ {
    FILE * fh;
    unsigned int len;
    unsigned int pos;
} CgiPostReadState;

/*
** cson_data_source_f() impl which reads only up to
** a specified amount of data from its input FILE.
** state MUST be a full populated (CgiPostReadState*).
*/
static int cson_data_source_FILE_n( void * state,
                                    void * dest,
                                    unsigned int * n ){
    if( ! state || !dest || !n ) return cson_rc.ArgError;
    else {
      CgiPostReadState * st = (CgiPostReadState *)state;
      if( st->pos >= st->len ){
        *n = 0;
        return 0;
      } else if( !*n || ((st->pos + *n) > st->len) ){
        return cson_rc.RangeError;
      }else{
        unsigned int rsz = (unsigned int)fread( dest, 1, *n, st->fh );
        if( ! rsz ){
          *n = rsz;
          return feof(st->fh) ? 0 : cson_rc.IOError;
        }else{
          *n = rsz;
          st->pos += *n;
          return 0;
        }
      }
    }
}

/*
** Reads a JSON object from the first contentLen bytes of zIn.  On
** g.json.post is updated to hold the content. On error a
** FSL_JSON_E_INVALID_REQUEST response is output and fossil_exit() is
** called (in HTTP mode exit code 0 is used).
**
** If contentLen is 0 then the whole file is read.
*/
void cgi_parse_POST_JSON( FILE * zIn, unsigned int contentLen ){
  cson_value * jv = NULL;
  int rc;
  CgiPostReadState state;
  state.fh = zIn;
  state.len = contentLen;
  state.pos = 0;
  rc = cson_parse( &jv,
                   contentLen ? cson_data_source_FILE_n : cson_data_source_FILE,
                   contentLen ? (void *)&state : (void *)zIn, NULL, NULL );
  if(rc){
    goto invalidRequest;
  }else{
    json_gc_add( "POST.JSON", jv );
    g.json.post.v = jv;
    g.json.post.o = cson_value_get_object( jv );
    if( !g.json.post.o ){ /* we don't support non-Object (Array) requests */
      goto invalidRequest;
    }
  }
  return;
  invalidRequest:
  cgi_set_content_type(json_guess_content_type());
  json_err( FSL_JSON_E_INVALID_REQUEST, NULL, 1 );
  fossil_exit( g.isHTTP ? 0 : 1);
}
#endif /* FOSSIL_ENABLE_JSON */


/*
** Initialize the query parameter database.  Information is pulled from
** the QUERY_STRING environment variable (if it exists), from standard
** input if there is POST data, and from HTTP_COOKIE.
*/
void cgi_init(void){
  char *z;
  const char *zType;
  int len;
#ifdef FOSSIL_ENABLE_JSON
  json_main_bootstrap();
#endif
  g.isHTTP = 1;
  cgi_destination(CGI_BODY);

  z = (char*)P("HTTP_COOKIE");
  if( z ){
    z = mprintf("%s",z);
    add_param_list(z, ';');
  }
  
  z = (char*)P("QUERY_STRING");
  if( z ){
    z = mprintf("%s",z);
    add_param_list(z, '&');
  }

  z = (char*)P("REMOTE_ADDR");
  if( z ){
    g.zIpAddr = mprintf("%s", z);
  }

  len = atoi(PD("CONTENT_LENGTH", "0"));
  g.zContentType = zType = P("CONTENT_TYPE");
  if( len>0 && zType ){
    blob_zero(&g.cgiIn);
    if( fossil_strcmp(zType,"application/x-www-form-urlencoded")==0 
         || strncmp(zType,"multipart/form-data",19)==0 ){
................................................................................
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
      blob_uncompress(&g.cgiIn, &g.cgiIn);
    }else if( fossil_strcmp(zType, "application/x-fossil-debug")==0 ){
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
    }else if( fossil_strcmp(zType, "application/x-fossil-uncompressed")==0 ){
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
    }
#ifdef FOSSIL_ENABLE_JSON
    else if( fossil_strcmp(zType, "application/json")
              || fossil_strcmp(zType,"text/plain")/*assume this MIGHT be JSON*/
              || fossil_strcmp(zType,"application/javascript")){
      g.json.isJsonMode = 1;
      cgi_parse_POST_JSON(g.httpIn, (unsigned int)len);
      /* FIXMEs:

      - See if fossil really needs g.cgiIn to be set for this purpose
      (i don't think it does). If it does then fill g.cgiIn and
      refactor to parse the JSON from there.
      



      - After parsing POST JSON, copy the "first layer" of keys/values
      to cgi_setenv(), honoring the upper-case distinction used
      in add_param_list(). However...

      - If we do that then we might get a disconnect in precedence of
      GET/POST arguments. i prefer for GET entries to take precedence
      over like-named POST entries, but in order for that to happen we
      need to process QUERY_STRING _after_ reading the POST data.
      */
      cgi_set_content_type(json_guess_content_type());
    }
#endif /* FOSSIL_ENABLE_JSON */
  }

}

/*
** This is the comparison function used to sort the aParamQP[] array of
** query parameters and cookies.
*/
static int qparam_compare(const void *a, const void *b){
................................................................................

/*
** Panic and die while processing a webpage.
*/
NORETURN void cgi_panic(const char *zFormat, ...){
  va_list ap;
  cgi_reset_content();
#ifdef FOSSIL_ENABLE_JSON
  if( g.json.isJsonMode ){
    char * zMsg;
    va_start(ap, zFormat);
    zMsg = vmprintf(zFormat,ap);
    va_end(ap);
    json_err( FSL_JSON_E_PANIC, zMsg, 1 );
    free(zMsg);
    fossil_exit( g.isHTTP ? 0 : 1 );
  }else
#endif /* FOSSIL_ENABLE_JSON */
  {
    cgi_set_status(500, "Internal Server Error");
    cgi_printf(
               "<html><body><h1>Internal Server Error</h1>\n"
               "<plaintext>"
               );
    va_start(ap, zFormat);
    vxprintf(pContent,zFormat,ap);
    va_end(ap);
    cgi_reply();
    fossil_exit(1);
  }
}

/*
** Remove the first space-delimited token from a string and return
** a pointer to it.  Add a NULL to the string to terminate the token.
** Make *zLeftOver point to the start of the next token.
*/
................................................................................
*/
void cgi_handle_http_request(const char *zIpAddr){
  char *z, *zToken;
  int i;
  struct sockaddr_in remoteName;
  socklen_t size = sizeof(struct sockaddr_in);
  char zLine[2000];     /* A single line of input. */

  g.fullHttpReply = 1;
  if( fgets(zLine, sizeof(zLine),g.httpIn)==0 ){
    malformed_request();
  }
  zToken = extract_token(zLine, &z);
  if( zToken==0 ){
    malformed_request();

#ifdef FOSSIL_ENABLE_JSON
/* auto-generated! Do not edit! */
#include "cson_amalgamation.h"
/* begin file parser/JSON_parser.h */
/* See JSON_parser.c for copyright information and licensing. */

#ifndef JSON_PARSER_H
#define JSON_PARSER_H

/* JSON_parser.h */


#include <stddef.h>

/* Windows DLL stuff */
#ifdef JSON_PARSER_DLL
#   ifdef _MSC_VER
#	    ifdef JSON_PARSER_DLL_EXPORTS
#		    define JSON_PARSER_DLL_API __declspec(dllexport)
#	    else
#		    define JSON_PARSER_DLL_API __declspec(dllimport)
#       endif
#   else
#	    define JSON_PARSER_DLL_API 
#   endif
#else
#	define JSON_PARSER_DLL_API 
#endif

/* Determine the integer type use to parse non-floating point numbers */
#if __STDC_VERSION__ >= 199901L || HAVE_LONG_LONG == 1
typedef long long JSON_int_t;
#define JSON_PARSER_INTEGER_SSCANF_TOKEN "%lld"
#define JSON_PARSER_INTEGER_SPRINTF_TOKEN "%lld"
#else 
typedef long JSON_int_t;
#define JSON_PARSER_INTEGER_SSCANF_TOKEN "%ld"
#define JSON_PARSER_INTEGER_SPRINTF_TOKEN "%ld"
#endif


#ifdef __cplusplus
extern "C" {
#endif 

typedef enum 
{
    JSON_E_NONE = 0,
    JSON_E_INVALID_CHAR,
    JSON_E_INVALID_KEYWORD,
    JSON_E_INVALID_ESCAPE_SEQUENCE,
    JSON_E_INVALID_UNICODE_SEQUENCE,
    JSON_E_INVALID_NUMBER,
    JSON_E_NESTING_DEPTH_REACHED,
    JSON_E_UNBALANCED_COLLECTION,
    JSON_E_EXPECTED_KEY,
    JSON_E_EXPECTED_COLON,
    JSON_E_OUT_OF_MEMORY
} JSON_error;

typedef enum 
{
    JSON_T_NONE = 0,
    JSON_T_ARRAY_BEGIN,
    JSON_T_ARRAY_END,
    JSON_T_OBJECT_BEGIN,
    JSON_T_OBJECT_END,
    JSON_T_INTEGER,
    JSON_T_FLOAT,
    JSON_T_NULL,
    JSON_T_TRUE,
    JSON_T_FALSE,
    JSON_T_STRING,
    JSON_T_KEY,
    JSON_T_MAX
} JSON_type;

typedef struct JSON_value_struct {
    union {
        JSON_int_t integer_value;
        
        double float_value;
        
        struct {
            const char* value;
            size_t length;
        } str;
    } vu;
} JSON_value;

typedef struct JSON_parser_struct* JSON_parser;

/*! \brief JSON parser callback 

    \param ctx The pointer passed to new_JSON_parser.
    \param type An element of JSON_type but not JSON_T_NONE.    
    \param value A representation of the parsed value. This parameter is NULL for
        JSON_T_ARRAY_BEGIN, JSON_T_ARRAY_END, JSON_T_OBJECT_BEGIN, JSON_T_OBJECT_END,
        JSON_T_NULL, JSON_T_TRUE, and JSON_T_FALSE. String values are always returned
        as zero-terminated C strings.

    \return Non-zero if parsing should continue, else zero.
*/    
typedef int (*JSON_parser_callback)(void* ctx, int type, const struct JSON_value_struct* value);


/**
   A typedef for allocator functions semantically compatible with malloc().
*/
typedef void* (*JSON_malloc_t)(size_t n);
/**
   A typedef for deallocator functions semantically compatible with free().
*/
typedef void (*JSON_free_t)(void* mem);

/*! \brief The structure used to configure a JSON parser object 
*/
typedef struct {
    /** Pointer to a callback, called when the parser has something to tell
        the user. This parameter may be NULL. In this case the input is
        merely checked for validity.
    */
    JSON_parser_callback    callback;
    /**
       Callback context - client-specified data to pass to the
       callback function. This parameter may be NULL.
    */
    void*                   callback_ctx;
    /** Specifies the levels of nested JSON to allow. Negative numbers yield unlimited nesting.
        If negative, the parser can parse arbitrary levels of JSON, otherwise
        the depth is the limit.
    */
    int                     depth;
    /**
       To allow C style comments in JSON, set to non-zero.
    */
    int                     allow_comments;
    /**
       To decode floating point numbers manually set this parameter to
       non-zero.
    */
    int                     handle_floats_manually;
    /**
       The memory allocation routine, which must be semantically
       compatible with malloc(3). If set to NULL, malloc(3) is used.

       If this is set to a non-NULL value then the 'free' member MUST be
       set to the proper deallocation counterpart for this function.
       Failure to do so results in undefined behaviour at deallocation
       time.
    */
    JSON_malloc_t       malloc;
    /**
       The memory deallocation routine, which must be semantically
       compatible with free(3). If set to NULL, free(3) is used.

       If this is set to a non-NULL value then the 'alloc' member MUST be
       set to the proper allocation counterpart for this function.
       Failure to do so results in undefined behaviour at deallocation
       time.
    */
    JSON_free_t         free;
} JSON_config;

/*! \brief Initializes the JSON parser configuration structure to default values.

    The default configuration is
    - 127 levels of nested JSON (depends on JSON_PARSER_STACK_SIZE, see json_parser.c)
    - no parsing, just checking for JSON syntax
    - no comments
    - Uses realloc() for memory de/allocation.

    \param config. Used to configure the parser.
*/
JSON_PARSER_DLL_API void init_JSON_config(JSON_config * config);

/*! \brief Create a JSON parser object 

    \param config. Used to configure the parser. Set to NULL to use
        the default configuration. See init_JSON_config.  Its contents are
        copied by this function, so it need not outlive the returned
        object.
    
    \return The parser object, which is owned by the caller and must eventually
    be freed by calling delete_JSON_parser().
*/
JSON_PARSER_DLL_API JSON_parser new_JSON_parser(JSON_config const* config);

/*! \brief Destroy a previously created JSON parser object. */
JSON_PARSER_DLL_API void delete_JSON_parser(JSON_parser jc);

/*! \brief Parse a character.

    \return Non-zero, if all characters passed to this function are part of are valid JSON.
*/
JSON_PARSER_DLL_API int JSON_parser_char(JSON_parser jc, int next_char);

/*! \brief Finalize parsing.

    Call this method once after all input characters have been consumed.
    
    \return Non-zero, if all parsed characters are valid JSON, zero otherwise.
*/
JSON_PARSER_DLL_API int JSON_parser_done(JSON_parser jc);

/*! \brief Determine if a given string is valid JSON white space 

    \return Non-zero if the string is valid, zero otherwise.
*/
JSON_PARSER_DLL_API int JSON_parser_is_legal_white_space_string(const char* s);

/*! \brief Gets the last error that occurred during the use of JSON_parser.

    \return A value from the JSON_error enum.
*/
JSON_PARSER_DLL_API int JSON_parser_get_last_error(JSON_parser jc);

/*! \brief Re-sets the parser to prepare it for another parse run.

    \return True (non-zero) on success, 0 on error (e.g. !jc).
*/
JSON_PARSER_DLL_API int JSON_parser_reset(JSON_parser jc);


#ifdef __cplusplus
}
#endif 
    

#endif /* JSON_PARSER_H */
/* end file parser/JSON_parser.h */
/* begin file parser/JSON_parser.c */
/*
Copyright (c) 2005 JSON.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

The Software shall be used for Good, not Evil.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

/*
    Callbacks, comments, Unicode handling by Jean Gressmann (jean@0x42.de), 2007-2010.
    
    
    Changelog:
        2010-11-25
            Support for custom memory allocation (sgbeal@googlemail.com).
                        
        2010-05-07
            Added error handling for memory allocation failure (sgbeal@googlemail.com). 
            Added diagnosis errors for invalid JSON.
            
        2010-03-25
            Fixed buffer overrun in grow_parse_buffer & cleaned up code.
            
        2009-10-19
            Replaced long double in JSON_value_struct with double after reports 
            of strtold being broken on some platforms (charles@transmissionbt.com).
            
        2009-05-17 
            Incorporated benrudiak@googlemail.com fix for UTF16 decoding.
            
        2009-05-14 
            Fixed float parsing bug related to a locale being set that didn't
            use '.' as decimal point character (charles@transmissionbt.com).
            
        2008-10-14 
            Renamed states.IN to states.IT to avoid name clash which IN macro
            defined in windef.h (alexey.pelykh@gmail.com)
            
        2008-07-19 
            Removed some duplicate code & debugging variable (charles@transmissionbt.com)
        
        2008-05-28 
            Made JSON_value structure ansi C compliant. This bug was report by 
            trisk@acm.jhu.edu
        
        2008-05-20 
            Fixed bug reported by charles@transmissionbt.com where the switching 
            from static to dynamic parse buffer did not copy the static parse 
            buffer's content.
*/



#include <assert.h>
#include <ctype.h>
#include <float.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>


#ifdef _MSC_VER
#   if _MSC_VER >= 1400 /* Visual Studio 2005 and up */
#      pragma warning(disable:4996) /* unsecure sscanf */
#      pragma warning(disable:4127) /* conditional expression is constant */
#   endif
#endif


#define true  1
#define false 0
#define __   -1     /* the universal error code */

/* values chosen so that the object size is approx equal to one page (4K) */
#ifndef JSON_PARSER_STACK_SIZE
#   define JSON_PARSER_STACK_SIZE 128
#endif

#ifndef JSON_PARSER_PARSE_BUFFER_SIZE
#   define JSON_PARSER_PARSE_BUFFER_SIZE 3500
#endif

typedef void* (*JSON_debug_malloc_t)(size_t bytes, const char* reason);

#ifdef JSON_PARSER_DEBUG_MALLOC
#   define JSON_parser_malloc(func, bytes, reason) ((JSON_debug_malloc_t)func)(bytes, reason)
#else
#   define JSON_parser_malloc(func, bytes, reason) func(bytes)
#endif

typedef unsigned short UTF16;

struct JSON_parser_struct {
    JSON_parser_callback callback;
    void* ctx;
    signed char state, before_comment_state, type, escaped, comment, allow_comments, handle_floats_manually, error;
    char decimal_point;
    UTF16 utf16_high_surrogate;
    int current_char;
    int depth;
    int top;
    int stack_capacity;
    signed char* stack;
    char* parse_buffer;
    size_t parse_buffer_capacity;
    size_t parse_buffer_count;
    signed char static_stack[JSON_PARSER_STACK_SIZE];
    char static_parse_buffer[JSON_PARSER_PARSE_BUFFER_SIZE];
    JSON_malloc_t malloc;
    JSON_free_t free;
};

#define COUNTOF(x) (sizeof(x)/sizeof(x[0])) 

/*
    Characters are mapped into these character classes. This allows for
    a significant reduction in the size of the state transition table.
*/



enum classes {
    C_SPACE,  /* space */
    C_WHITE,  /* other whitespace */
    C_LCURB,  /* {  */
    C_RCURB,  /* } */
    C_LSQRB,  /* [ */
    C_RSQRB,  /* ] */
    C_COLON,  /* : */
    C_COMMA,  /* , */
    C_QUOTE,  /* " */
    C_BACKS,  /* \ */
    C_SLASH,  /* / */
    C_PLUS,   /* + */
    C_MINUS,  /* - */
    C_POINT,  /* . */
    C_ZERO ,  /* 0 */
    C_DIGIT,  /* 123456789 */
    C_LOW_A,  /* a */
    C_LOW_B,  /* b */
    C_LOW_C,  /* c */
    C_LOW_D,  /* d */
    C_LOW_E,  /* e */
    C_LOW_F,  /* f */
    C_LOW_L,  /* l */
    C_LOW_N,  /* n */
    C_LOW_R,  /* r */
    C_LOW_S,  /* s */
    C_LOW_T,  /* t */
    C_LOW_U,  /* u */
    C_ABCDF,  /* ABCDF */
    C_E,      /* E */
    C_ETC,    /* everything else */
    C_STAR,   /* * */   
    NR_CLASSES
};

static const signed char ascii_class[128] = {
/*
    This array maps the 128 ASCII characters into character classes.
    The remaining Unicode characters should be mapped to C_ETC.
    Non-whitespace control characters are errors.
*/
    __,      __,      __,      __,      __,      __,      __,      __,
    __,      C_WHITE, C_WHITE, __,      __,      C_WHITE, __,      __,
    __,      __,      __,      __,      __,      __,      __,      __,
    __,      __,      __,      __,      __,      __,      __,      __,

    C_SPACE, C_ETC,   C_QUOTE, C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,
    C_ETC,   C_ETC,   C_STAR,   C_PLUS,  C_COMMA, C_MINUS, C_POINT, C_SLASH,
    C_ZERO,  C_DIGIT, C_DIGIT, C_DIGIT, C_DIGIT, C_DIGIT, C_DIGIT, C_DIGIT,
    C_DIGIT, C_DIGIT, C_COLON, C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,

    C_ETC,   C_ABCDF, C_ABCDF, C_ABCDF, C_ABCDF, C_E,     C_ABCDF, C_ETC,
    C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,
    C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,
    C_ETC,   C_ETC,   C_ETC,   C_LSQRB, C_BACKS, C_RSQRB, C_ETC,   C_ETC,

    C_ETC,   C_LOW_A, C_LOW_B, C_LOW_C, C_LOW_D, C_LOW_E, C_LOW_F, C_ETC,
    C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_LOW_L, C_ETC,   C_LOW_N, C_ETC,
    C_ETC,   C_ETC,   C_LOW_R, C_LOW_S, C_LOW_T, C_LOW_U, C_ETC,   C_ETC,
    C_ETC,   C_ETC,   C_ETC,   C_LCURB, C_ETC,   C_RCURB, C_ETC,   C_ETC
};


/*
    The state codes.
*/
enum states {
    GO,  /* start    */
    OK,  /* ok       */
    OB,  /* object   */
    KE,  /* key      */
    CO,  /* colon    */
    VA,  /* value    */
    AR,  /* array    */
    ST,  /* string   */
    ES,  /* escape   */
    U1,  /* u1       */
    U2,  /* u2       */
    U3,  /* u3       */
    U4,  /* u4       */
    MI,  /* minus    */
    ZE,  /* zero     */
    IT,  /* integer  */
    FR,  /* fraction */
    E1,  /* e        */
    E2,  /* ex       */
    E3,  /* exp      */
    T1,  /* tr       */
    T2,  /* tru      */
    T3,  /* true     */
    F1,  /* fa       */
    F2,  /* fal      */
    F3,  /* fals     */
    F4,  /* false    */
    N1,  /* nu       */
    N2,  /* nul      */
    N3,  /* null     */
    C1,  /* /        */
    C2,  /* / *     */
    C3,  /* *        */
    FX,  /* *.* *eE* */
    D1,  /* second UTF-16 character decoding started by \ */
    D2,  /* second UTF-16 character proceeded by u */
    NR_STATES
};

enum actions
{
    CB = -10, /* comment begin */
    CE = -11, /* comment end */
    FA = -12, /* false */
    TR = -13, /* false */
    NU = -14, /* null */
    DE = -15, /* double detected by exponent e E */
    DF = -16, /* double detected by fraction . */
    SB = -17, /* string begin */
    MX = -18, /* integer detected by minus */
    ZX = -19, /* integer detected by zero */
    IX = -20, /* integer detected by 1-9 */
    EX = -21, /* next char is escaped */
    UC = -22  /* Unicode character read */
};


static const signed char state_transition_table[NR_STATES][NR_CLASSES] = {
/*
    The state transition table takes the current state and the current symbol,
    and returns either a new state or an action. An action is represented as a
    negative number. A JSON text is accepted if at the end of the text the
    state is OK and if the mode is MODE_DONE.

                 white                                      1-9                                   ABCDF  etc
             space |  {  }  [  ]  :  ,  "  \  /  +  -  .  0  |  a  b  c  d  e  f  l  n  r  s  t  u  |  E  |  * */
/*start  GO*/ {GO,GO,-6,__,-5,__,__,__,__,__,CB,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*ok     OK*/ {OK,OK,__,-8,__,-7,__,-3,__,__,CB,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*object OB*/ {OB,OB,__,-9,__,__,__,__,SB,__,CB,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*key    KE*/ {KE,KE,__,__,__,__,__,__,SB,__,CB,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*colon  CO*/ {CO,CO,__,__,__,__,-2,__,__,__,CB,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*value  VA*/ {VA,VA,-6,__,-5,__,__,__,SB,__,CB,__,MX,__,ZX,IX,__,__,__,__,__,FA,__,NU,__,__,TR,__,__,__,__,__},
/*array  AR*/ {AR,AR,-6,__,-5,-7,__,__,SB,__,CB,__,MX,__,ZX,IX,__,__,__,__,__,FA,__,NU,__,__,TR,__,__,__,__,__},
/*string ST*/ {ST,__,ST,ST,ST,ST,ST,ST,-4,EX,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST},
/*escape ES*/ {__,__,__,__,__,__,__,__,ST,ST,ST,__,__,__,__,__,__,ST,__,__,__,ST,__,ST,ST,__,ST,U1,__,__,__,__},
/*u1     U1*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,U2,U2,U2,U2,U2,U2,U2,U2,__,__,__,__,__,__,U2,U2,__,__},
/*u2     U2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,U3,U3,U3,U3,U3,U3,U3,U3,__,__,__,__,__,__,U3,U3,__,__},
/*u3     U3*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,U4,U4,U4,U4,U4,U4,U4,U4,__,__,__,__,__,__,U4,U4,__,__},
/*u4     U4*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,UC,UC,UC,UC,UC,UC,UC,UC,__,__,__,__,__,__,UC,UC,__,__},
/*minus  MI*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,ZE,IT,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*zero   ZE*/ {OK,OK,__,-8,__,-7,__,-3,__,__,CB,__,__,DF,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*int    IT*/ {OK,OK,__,-8,__,-7,__,-3,__,__,CB,__,__,DF,IT,IT,__,__,__,__,DE,__,__,__,__,__,__,__,__,DE,__,__},
/*frac   FR*/ {OK,OK,__,-8,__,-7,__,-3,__,__,CB,__,__,__,FR,FR,__,__,__,__,E1,__,__,__,__,__,__,__,__,E1,__,__},
/*e      E1*/ {__,__,__,__,__,__,__,__,__,__,__,E2,E2,__,E3,E3,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*ex     E2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,E3,E3,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*exp    E3*/ {OK,OK,__,-8,__,-7,__,-3,__,__,__,__,__,__,E3,E3,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*tr     T1*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,T2,__,__,__,__,__,__,__},
/*tru    T2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,T3,__,__,__,__},
/*true   T3*/ {__,__,__,__,__,__,__,__,__,__,CB,__,__,__,__,__,__,__,__,__,OK,__,__,__,__,__,__,__,__,__,__,__},
/*fa     F1*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,F2,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*fal    F2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,F3,__,__,__,__,__,__,__,__,__},
/*fals   F3*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,F4,__,__,__,__,__,__},
/*false  F4*/ {__,__,__,__,__,__,__,__,__,__,CB,__,__,__,__,__,__,__,__,__,OK,__,__,__,__,__,__,__,__,__,__,__},
/*nu     N1*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,N2,__,__,__,__},
/*nul    N2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,N3,__,__,__,__,__,__,__,__,__},
/*null   N3*/ {__,__,__,__,__,__,__,__,__,__,CB,__,__,__,__,__,__,__,__,__,__,__,OK,__,__,__,__,__,__,__,__,__},
/*/      C1*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,C2},
/*/*     C2*/ {C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C3},
/**      C3*/ {C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,CE,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C3},
/*_.     FX*/ {OK,OK,__,-8,__,-7,__,-3,__,__,__,__,__,__,FR,FR,__,__,__,__,E1,__,__,__,__,__,__,__,__,E1,__,__},
/*\      D1*/ {__,__,__,__,__,__,__,__,__,D2,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*\      D2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,U1,__,__,__,__},
};


/*
    These modes can be pushed on the stack.
*/
enum modes {
    MODE_ARRAY = 1, 
    MODE_DONE = 2,  
    MODE_KEY = 3,   
    MODE_OBJECT = 4
};

static void set_error(JSON_parser jc)
{
    switch (jc->state) {
        case GO:
            switch (jc->current_char) {
            case '{': case '}': case '[': case ']': 
                jc->error = JSON_E_UNBALANCED_COLLECTION;
                break;
            default:
                jc->error = JSON_E_INVALID_CHAR;
                break;    
            }
            break;
        case OB:
            jc->error = JSON_E_EXPECTED_KEY;
            break;
        case AR:
            jc->error = JSON_E_UNBALANCED_COLLECTION;
            break;
        case CO:
            jc->error = JSON_E_EXPECTED_COLON;
            break;
        case KE:
            jc->error = JSON_E_EXPECTED_KEY;
            break;
        /* \uXXXX\uYYYY */
        case U1: case U2: case U3: case U4: case D1: case D2:
            jc->error = JSON_E_INVALID_UNICODE_SEQUENCE;
            break;
        /* true, false, null */
        case T1: case T2: case T3: case F1: case F2: case F3: case F4: case N1: case N2: case N3:
            jc->error = JSON_E_INVALID_KEYWORD;
            break;
        /* minus, integer, fraction, exponent */
        case MI: case ZE: case IT: case FR: case E1: case E2: case E3:
            jc->error = JSON_E_INVALID_NUMBER;
            break;
        default:
            jc->error = JSON_E_INVALID_CHAR;
            break;
    }
}

static int
push(JSON_parser jc, int mode)
{
/*
    Push a mode onto the stack. Return false if there is overflow.
*/
    assert(jc->top <= jc->stack_capacity);
    
    if (jc->depth < 0) {
        if (jc->top == jc->stack_capacity) {
            const size_t bytes_to_copy = jc->stack_capacity * sizeof(jc->stack[0]);
            const size_t new_capacity = jc->stack_capacity * 2;
            const size_t bytes_to_allocate = new_capacity * sizeof(jc->stack[0]);
            void* mem = JSON_parser_malloc(jc->malloc, bytes_to_allocate, "stack");
            if (!mem) {
                jc->error = JSON_E_OUT_OF_MEMORY;
                return false;
            }
            jc->stack_capacity = (int)new_capacity;
            memcpy(mem, jc->stack, bytes_to_copy);
            if (jc->stack != &jc->static_stack[0]) {
                jc->free(jc->stack);
            }
            jc->stack = (signed char*)mem;
        }
    } else {
        if (jc->top == jc->depth) {
            jc->error = JSON_E_NESTING_DEPTH_REACHED;
            return false;
        }
    }
    jc->stack[++jc->top] = (signed char)mode;
    return true;
}


static int
pop(JSON_parser jc, int mode)
{
/*
    Pop the stack, assuring that the current mode matches the expectation.
    Return false if there is underflow or if the modes mismatch.
*/
    if (jc->top < 0 || jc->stack[jc->top] != mode) {
        return false;
    }
    jc->top -= 1;
    return true;
}


#define parse_buffer_clear(jc) \
    do {\
        jc->parse_buffer_count = 0;\
        jc->parse_buffer[0] = 0;\
    } while (0)
    
#define parse_buffer_pop_back_char(jc)\
    do {\
        assert(jc->parse_buffer_count >= 1);\
        --jc->parse_buffer_count;\
        jc->parse_buffer[jc->parse_buffer_count] = 0;\
    } while (0)    



void delete_JSON_parser(JSON_parser jc)
{
    if (jc) {
        if (jc->stack != &jc->static_stack[0]) {
            jc->free((void*)jc->stack);
        }
        if (jc->parse_buffer != &jc->static_parse_buffer[0]) {
            jc->free((void*)jc->parse_buffer);
        }
        jc->free((void*)jc);
     }   
}

int JSON_parser_reset(JSON_parser jc)
{
    if (NULL == jc) {
        return false;
    }
    
    jc->state = GO;
    jc->top = -1;

    /* parser has been used previously? */
    if (NULL == jc->parse_buffer) {
    
        /* Do we want non-bound stack? */
        if (jc->depth > 0) {
            jc->stack_capacity = jc->depth;
            if (jc->depth <= (int)COUNTOF(jc->static_stack)) {
                jc->stack = &jc->static_stack[0];
            } else {
                const size_t bytes_to_alloc = jc->stack_capacity * sizeof(jc->stack[0]);
                jc->stack = (signed char*)JSON_parser_malloc(jc->malloc, bytes_to_alloc, "stack");
                if (jc->stack == NULL) {
                    return false;
                }
            }
        } else {
            jc->stack_capacity = (int)COUNTOF(jc->static_stack);
            jc->depth = -1;
            jc->stack = &jc->static_stack[0];
        }
        
        /* set up the parse buffer */
        jc->parse_buffer = &jc->static_parse_buffer[0];
        jc->parse_buffer_capacity = COUNTOF(jc->static_parse_buffer);
    }
    
    /* set parser to start */
    push(jc, MODE_DONE);
    parse_buffer_clear(jc);
    
    return true;
}

JSON_parser
new_JSON_parser(JSON_config const * config)
{
/*
    new_JSON_parser starts the checking process by constructing a JSON_parser
    object. It takes a depth parameter that restricts the level of maximum
    nesting.

    To continue the process, call JSON_parser_char for each character in the
    JSON text, and then call JSON_parser_done to obtain the final result.
    These functions are fully reentrant.
*/

    int use_std_malloc = false;
    JSON_config default_config;
    JSON_parser jc;
    JSON_malloc_t alloc;
    
    /* set to default configuration if none was provided */
    if (NULL == config) {
        /* initialize configuration */
        init_JSON_config(&default_config);
        config = &default_config;
    }
    
    /* use std malloc if either the allocator or deallocator function isn't set */
    use_std_malloc = NULL == config->malloc || NULL == config->free;
    
    alloc = use_std_malloc ? malloc : config->malloc;
    
    jc = JSON_parser_malloc(alloc, sizeof(*jc), "parser");    
    
    if (NULL == jc) {
        return NULL;
    }
    
    /* configure the parser */
    memset(jc, 0, sizeof(*jc));
    jc->malloc = alloc;
    jc->free = use_std_malloc ? free : config->free;
    jc->callback = config->callback;
    jc->ctx = config->callback_ctx;
    jc->allow_comments = (signed char)(config->allow_comments != 0);
    jc->handle_floats_manually = (signed char)(config->handle_floats_manually != 0);
    jc->decimal_point = *localeconv()->decimal_point;
    /* We need to be able to push at least one object */
    jc->depth = config->depth == 0 ? 1 : config->depth;
    
    /* reset the parser */
    if (!JSON_parser_reset(jc)) {
        jc->free(jc);
        return NULL;
    }
    
    return jc;
}

static int parse_buffer_grow(JSON_parser jc)
{
    const size_t bytes_to_copy = jc->parse_buffer_count * sizeof(jc->parse_buffer[0]);
    const size_t new_capacity = jc->parse_buffer_capacity * 2;
    const size_t bytes_to_allocate = new_capacity * sizeof(jc->parse_buffer[0]);
    void* mem = JSON_parser_malloc(jc->malloc, bytes_to_allocate, "parse buffer");
    
    if (mem == NULL) {
        jc->error = JSON_E_OUT_OF_MEMORY;
        return false;
    }
    
    assert(new_capacity > 0);
    memcpy(mem, jc->parse_buffer, bytes_to_copy);
    
    if (jc->parse_buffer != &jc->static_parse_buffer[0]) {
        jc->free(jc->parse_buffer);
    }
    
    jc->parse_buffer = (char*)mem;
    jc->parse_buffer_capacity = new_capacity;
    
    return true;
}

static int parse_buffer_reserve_for(JSON_parser jc, unsigned chars)
{
    while (jc->parse_buffer_count + chars + 1 > jc->parse_buffer_capacity) {
        if (!parse_buffer_grow(jc)) {
            assert(jc->error == JSON_E_OUT_OF_MEMORY);
            return false;
        }
    }
    
    return true;
}

#define parse_buffer_has_space_for(jc, count) \
    (jc->parse_buffer_count + (count) + 1 <= jc->parse_buffer_capacity)

#define parse_buffer_push_back_char(jc, c)\
    do {\
        assert(parse_buffer_has_space_for(jc, 1)); \
        jc->parse_buffer[jc->parse_buffer_count++] = c;\
        jc->parse_buffer[jc->parse_buffer_count]   = 0;\
    } while (0)

#define assert_is_non_container_type(jc) \
    assert( \
        jc->type == JSON_T_NULL || \
        jc->type == JSON_T_FALSE || \
        jc->type == JSON_T_TRUE || \
        jc->type == JSON_T_FLOAT || \
        jc->type == JSON_T_INTEGER || \
        jc->type == JSON_T_STRING)
    

static int parse_parse_buffer(JSON_parser jc)
{
    if (jc->callback) {
        JSON_value value, *arg = NULL;
        
        if (jc->type != JSON_T_NONE) {
            assert_is_non_container_type(jc);
        
            switch(jc->type) {
                case JSON_T_FLOAT:
                    arg = &value;
                    if (jc->handle_floats_manually) {
                        value.vu.str.value = jc->parse_buffer;
                        value.vu.str.length = jc->parse_buffer_count;
                    } else { 
                        /* not checking with end pointer b/c there may be trailing ws */
                        value.vu.float_value = strtod(jc->parse_buffer, NULL);
                    }
                    break;
                case JSON_T_INTEGER:
                    arg = &value;
                    sscanf(jc->parse_buffer, JSON_PARSER_INTEGER_SSCANF_TOKEN, &value.vu.integer_value);
                    break;
                case JSON_T_STRING:
                    arg = &value;
                    value.vu.str.value = jc->parse_buffer;
                    value.vu.str.length = jc->parse_buffer_count;
                    break;
            }
            
            if (!(*jc->callback)(jc->ctx, jc->type, arg)) {
                return false;
            }
        }
    }
    
    parse_buffer_clear(jc);
    
    return true;
}

#define IS_HIGH_SURROGATE(uc) (((uc) & 0xFC00) == 0xD800)
#define IS_LOW_SURROGATE(uc)  (((uc) & 0xFC00) == 0xDC00)
#define DECODE_SURROGATE_PAIR(hi,lo) ((((hi) & 0x3FF) << 10) + ((lo) & 0x3FF) + 0x10000)
static const unsigned char utf8_lead_bits[4] = { 0x00, 0xC0, 0xE0, 0xF0 };

static int decode_unicode_char(JSON_parser jc)
{
    int i;
    unsigned uc = 0;
    char* p;
    int trail_bytes;
    
    assert(jc->parse_buffer_count >= 6);
    
    p = &jc->parse_buffer[jc->parse_buffer_count - 4];
    
    for (i = 12; i >= 0; i -= 4, ++p) {
        unsigned x = *p;
        
        if (x >= 'a') {
            x -= ('a' - 10);
        } else if (x >= 'A') {
            x -= ('A' - 10);
        } else {
            x &= ~0x30u;
        }
        
        assert(x < 16);
        
        uc |= x << i;
    }
    
    /* clear UTF-16 char from buffer */
    jc->parse_buffer_count -= 6;
    jc->parse_buffer[jc->parse_buffer_count] = 0;
    
    /* attempt decoding ... */
    if (jc->utf16_high_surrogate) {
        if (IS_LOW_SURROGATE(uc)) {
            uc = DECODE_SURROGATE_PAIR(jc->utf16_high_surrogate, uc);
            trail_bytes = 3;
            jc->utf16_high_surrogate = 0;
        } else {
            /* high surrogate without a following low surrogate */
            return false;
        }
    } else {
        if (uc < 0x80) {
            trail_bytes = 0;
        } else if (uc < 0x800) {
            trail_bytes = 1;
        } else if (IS_HIGH_SURROGATE(uc)) {
            /* save the high surrogate and wait for the low surrogate */
            jc->utf16_high_surrogate = (UTF16)uc;
            return true;
        } else if (IS_LOW_SURROGATE(uc)) {
            /* low surrogate without a preceding high surrogate */
            return false;
        } else {
            trail_bytes = 2;
        }
    }
    
    jc->parse_buffer[jc->parse_buffer_count++] = (char) ((uc >> (trail_bytes * 6)) | utf8_lead_bits[trail_bytes]);
    
    for (i = trail_bytes * 6 - 6; i >= 0; i -= 6) {
        jc->parse_buffer[jc->parse_buffer_count++] = (char) (((uc >> i) & 0x3F) | 0x80);
    }

    jc->parse_buffer[jc->parse_buffer_count] = 0;
    
    return true;
}

static int add_escaped_char_to_parse_buffer(JSON_parser jc, int next_char)
{
    assert(parse_buffer_has_space_for(jc, 1));
    
    jc->escaped = 0;
    /* remove the backslash */
    parse_buffer_pop_back_char(jc);
    switch(next_char) {
        case 'b':
            parse_buffer_push_back_char(jc, '\b');
            break;
        case 'f':
            parse_buffer_push_back_char(jc, '\f');
            break;
        case 'n':
            parse_buffer_push_back_char(jc, '\n');
            break;
        case 'r':
            parse_buffer_push_back_char(jc, '\r');
            break;
        case 't':
            parse_buffer_push_back_char(jc, '\t');
            break;
        case '"':
            parse_buffer_push_back_char(jc, '"');
            break;
        case '\\':
            parse_buffer_push_back_char(jc, '\\');
            break;
        case '/':
            parse_buffer_push_back_char(jc, '/');
            break;
        case 'u':
            parse_buffer_push_back_char(jc, '\\');
            parse_buffer_push_back_char(jc, 'u');
            break;
        default:
            return false;
    }

    return true;
}

static int add_char_to_parse_buffer(JSON_parser jc, int next_char, int next_class)
{
    if (!parse_buffer_reserve_for(jc, 1)) {
        assert(JSON_E_OUT_OF_MEMORY == jc->error);
        return false;
    }
    
    if (jc->escaped) {
        if (!add_escaped_char_to_parse_buffer(jc, next_char)) {
            jc->error = JSON_E_INVALID_ESCAPE_SEQUENCE;
            return false; 
        }
    } else if (!jc->comment) {
        if ((jc->type != JSON_T_NONE) | !((next_class == C_SPACE) | (next_class == C_WHITE)) /* non-white-space */) {
            parse_buffer_push_back_char(jc, (char)next_char);
        }
    }
    
    return true;
}

#define assert_type_isnt_string_null_or_bool(jc) \
    assert(jc->type != JSON_T_FALSE); \
    assert(jc->type != JSON_T_TRUE); \
    assert(jc->type != JSON_T_NULL); \
    assert(jc->type != JSON_T_STRING)


int
JSON_parser_char(JSON_parser jc, int next_char)
{
/*
    After calling new_JSON_parser, call this function for each character (or
    partial character) in your JSON text. It can accept UTF-8, UTF-16, or
    UTF-32. It returns true if things are looking ok so far. If it rejects the
    text, it returns false.
*/
    int next_class, next_state;

/*
    Store the current char for error handling
*/    
    jc->current_char = next_char;
    
/*
    Determine the character's class.
*/
    if (next_char < 0) {
        jc->error = JSON_E_INVALID_CHAR;
        return false;
    }
    if (next_char >= 128) {
        next_class = C_ETC;
    } else {
        next_class = ascii_class[next_char];
        if (next_class <= __) {
            set_error(jc);
            return false;
        }
    }
    
    if (!add_char_to_parse_buffer(jc, next_char, next_class)) {
        return false;
    }
    
/*
    Get the next state from the state transition table.
*/
    next_state = state_transition_table[jc->state][next_class];
    if (next_state >= 0) {
/*
    Change the state.
*/
        jc->state = (signed char)next_state;
    } else {
/*
    Or perform one of the actions.
*/
        switch (next_state) {
/* Unicode character */        
        case UC:
            if(!decode_unicode_char(jc)) {
                jc->error = JSON_E_INVALID_UNICODE_SEQUENCE;
                return false;
            }
            /* check if we need to read a second UTF-16 char */
            if (jc->utf16_high_surrogate) {
                jc->state = D1;
            } else {
                jc->state = ST;
            }
            break;
/* escaped char */
        case EX:
            jc->escaped = 1;
            jc->state = ES;
            break;
/* integer detected by minus */
        case MX:
            jc->type = JSON_T_INTEGER;
            jc->state = MI;
            break;  
/* integer detected by zero */            
        case ZX:
            jc->type = JSON_T_INTEGER;
            jc->state = ZE;
            break;  
/* integer detected by 1-9 */            
        case IX:
            jc->type = JSON_T_INTEGER;
            jc->state = IT;
            break;  
            
/* floating point number detected by exponent*/
        case DE:
            assert_type_isnt_string_null_or_bool(jc);
            jc->type = JSON_T_FLOAT;
            jc->state = E1;
            break;   
        
/* floating point number detected by fraction */
        case DF:
            assert_type_isnt_string_null_or_bool(jc);
            if (!jc->handle_floats_manually) {
/*
    Some versions of strtod (which underlies sscanf) don't support converting 
    C-locale formated floating point values.
*/           
                assert(jc->parse_buffer[jc->parse_buffer_count-1] == '.');
                jc->parse_buffer[jc->parse_buffer_count-1] = jc->decimal_point;
            }            
            jc->type = JSON_T_FLOAT;
            jc->state = FX;
            break;   
/* string begin " */
        case SB:
            parse_buffer_clear(jc);
            assert(jc->type == JSON_T_NONE);
            jc->type = JSON_T_STRING;
            jc->state = ST;
            break;        
        
/* n */
        case NU:
            assert(jc->type == JSON_T_NONE);
            jc->type = JSON_T_NULL;
            jc->state = N1;
            break;        
/* f */
        case FA:
            assert(jc->type == JSON_T_NONE);
            jc->type = JSON_T_FALSE;
            jc->state = F1;
            break;        
/* t */
        case TR:
            assert(jc->type == JSON_T_NONE);
            jc->type = JSON_T_TRUE;
            jc->state = T1;
            break;        
        
/* closing comment */
        case CE:
            jc->comment = 0;
            assert(jc->parse_buffer_count == 0);
            assert(jc->type == JSON_T_NONE);
            jc->state = jc->before_comment_state;
            break;        
        
/* opening comment  */
        case CB:
            if (!jc->allow_comments) {
                return false;
            }
            parse_buffer_pop_back_char(jc);
            if (!parse_parse_buffer(jc)) {
                return false;
            }
            assert(jc->parse_buffer_count == 0);
            assert(jc->type != JSON_T_STRING);
            switch (jc->stack[jc->top]) {
            case MODE_ARRAY:
            case MODE_OBJECT:   
                switch(jc->state) {
                case VA:
                case AR:
                    jc->before_comment_state = jc->state;
                    break;
                default:
                    jc->before_comment_state = OK;
                    break;
                }
                break;
            default:
                jc->before_comment_state = jc->state;
                break;
            }
            jc->type = JSON_T_NONE;
            jc->state = C1;
            jc->comment = 1;
            break;
/* empty } */
        case -9:        
            parse_buffer_clear(jc);
            if (jc->callback && !(*jc->callback)(jc->ctx, JSON_T_OBJECT_END, NULL)) {
                return false;
            }
            if (!pop(jc, MODE_KEY)) {
                return false;
            }
            jc->state = OK;
            break;

/* } */ case -8:
            parse_buffer_pop_back_char(jc);
            if (!parse_parse_buffer(jc)) {
                return false;
            }
            if (jc->callback && !(*jc->callback)(jc->ctx, JSON_T_OBJECT_END, NULL)) {
                return false;
            }
            if (!pop(jc, MODE_OBJECT)) {
                jc->error = JSON_E_UNBALANCED_COLLECTION;
                return false;
            }
            jc->type = JSON_T_NONE;
            jc->state = OK;
            break;

/* ] */ case -7:
            parse_buffer_pop_back_char(jc);
            if (!parse_parse_buffer(jc)) {
                return false;
            }
            if (jc->callback && !(*jc->callback)(jc->ctx, JSON_T_ARRAY_END, NULL)) {
                return false;
            }
            if (!pop(jc, MODE_ARRAY)) {
                jc->error = JSON_E_UNBALANCED_COLLECTION;
                return false;
            }
            
            jc->type = JSON_T_NONE;
            jc->state = OK;
            break;

/* { */ case -6:
            parse_buffer_pop_back_char(jc);
            if (jc->callback && !(*jc->callback)(jc->ctx, JSON_T_OBJECT_BEGIN, NULL)) {
                return false;
            }
            if (!push(jc, MODE_KEY)) {
                return false;
            }
            assert(jc->type == JSON_T_NONE);
            jc->state = OB;
            break;

/* [ */ case -5:
            parse_buffer_pop_back_char(jc);
            if (jc->callback && !(*jc->callback)(jc->ctx, JSON_T_ARRAY_BEGIN, NULL)) {
                return false;
            }
            if (!push(jc, MODE_ARRAY)) {
                return false;
            }
            assert(jc->type == JSON_T_NONE);
            jc->state = AR;
            break;

/* string end " */ case -4:
            parse_buffer_pop_back_char(jc);
            switch (jc->stack[jc->top]) {
            case MODE_KEY:
                assert(jc->type == JSON_T_STRING);
                jc->type = JSON_T_NONE;
                jc->state = CO;
                
                if (jc->callback) {
                    JSON_value value;
                    value.vu.str.value = jc->parse_buffer;
                    value.vu.str.length = jc->parse_buffer_count;
                    if (!(*jc->callback)(jc->ctx, JSON_T_KEY, &value)) {
                        return false;
                    }
                }
                parse_buffer_clear(jc);
                break;
            case MODE_ARRAY:
            case MODE_OBJECT:
                assert(jc->type == JSON_T_STRING);
                if (!parse_parse_buffer(jc)) {
                    return false;
                }
                jc->type = JSON_T_NONE;
                jc->state = OK;
                break;
            default:
                return false;
            }
            break;

/* , */ case -3:
            parse_buffer_pop_back_char(jc);
            if (!parse_parse_buffer(jc)) {
                return false;
            }
            switch (jc->stack[jc->top]) {
            case MODE_OBJECT:
/*
    A comma causes a flip from object mode to key mode.
*/
                if (!pop(jc, MODE_OBJECT) || !push(jc, MODE_KEY)) {
                    return false;
                }
                assert(jc->type != JSON_T_STRING);
                jc->type = JSON_T_NONE;
                jc->state = KE;
                break;
            case MODE_ARRAY:
                assert(jc->type != JSON_T_STRING);
                jc->type = JSON_T_NONE;
                jc->state = VA;
                break;
            default:
                return false;
            }
            break;

/* : */ case -2:
/*
    A colon causes a flip from key mode to object mode.
*/
            parse_buffer_pop_back_char(jc);
            if (!pop(jc, MODE_KEY) || !push(jc, MODE_OBJECT)) {
                return false;
            }
            assert(jc->type == JSON_T_NONE);
            jc->state = VA;
            break;
/*
    Bad action.
*/
        default:
            set_error(jc);
            return false;
        }
    }
    return true;
}

int
JSON_parser_done(JSON_parser jc)
{
    if ((jc->state == OK || jc->state == GO) && pop(jc, MODE_DONE))
    {
        return true;
    }

    jc->error = JSON_E_UNBALANCED_COLLECTION;
    return false;
}


int JSON_parser_is_legal_white_space_string(const char* s)
{
    int c, char_class;
    
    if (s == NULL) {
        return false;
    }
    
    for (; *s; ++s) {   
        c = *s;
        
        if (c < 0 || c >= 128) {
            return false;
        }
        
        char_class = ascii_class[c];
        
        if (char_class != C_SPACE && char_class != C_WHITE) {
            return false;
        }
    }
    
    return true;
}

int JSON_parser_get_last_error(JSON_parser jc)
{
    return jc->error;
}


void init_JSON_config(JSON_config* config)
{
    if (config) {
        memset(config, 0, sizeof(*config));
        
        config->depth = JSON_PARSER_STACK_SIZE - 1;
        config->malloc = malloc;
        config->free = free;
    }
}
/* end file parser/JSON_parser.c */
/* begin file ./cson.c */
#include <assert.h>
#include <stdlib.h> /* malloc()/free() */
#include <string.h>

#ifdef _MSC_VER
#   if _MSC_VER >= 1400 /* Visual Studio 2005 and up */
#     pragma warning( push )
#     pragma warning(disable:4996) /* unsecure sscanf (but snscanf() isn't in c89) */
#     pragma warning(disable:4244) /* complaining about data loss due
                                      to integer precision in the
                                      sqlite3 utf decoding routines */
#   endif
#endif

#if 1
#include <stdio.h>
#define MARKER if(1) printf("MARKER: %s:%d:%s():\t",__FILE__,__LINE__,__func__); if(1) printf
#else
static void noop_printf(char const * fmt, ...) {}
#define MARKER if(0) printf
#endif

#if defined(__cplusplus)
extern "C" {
#endif


    
/**
   Type IDs corresponding to JavaScript/JSON types.
*/
enum cson_type_id {
  /**
    The special "null" value constant.

    Its value must be 0 for internal reasons.
 */
 CSON_TYPE_UNDEF = 0,
 /**
    The special "null" value constant.
 */
 CSON_TYPE_NULL = 1,
 /**
    The bool value type.
 */
 CSON_TYPE_BOOL = 2,
 /**
    The integer value type, represented in this library
    by cson_int_t.
 */
 CSON_TYPE_INTEGER = 3,
 /**
    The double value type, represented in this library
    by cson_double_t.
 */
 CSON_TYPE_DOUBLE = 4,
 /** The immutable string type. This library stores strings
    as immutable UTF8.
 */
 CSON_TYPE_STRING = 5,
 /** The "Array" type. */
 CSON_TYPE_ARRAY = 6,
 /** The "Object" type. */
 CSON_TYPE_OBJECT = 7
};
typedef enum cson_type_id cson_type_id;

/**
   This type holds the "vtbl" for type-specific operations when
   working with cson_value objects.

   All cson_values of a given logical type share a pointer to a single
   library-internal instance of this class.
*/
struct cson_value_api
{
    /**
       The logical JavaScript/JSON type associated with
       this object.
     */
    const cson_type_id typeID;
    /**
       Must free any memory associated with self,
       but not free self. If self is NULL then
       this function must do nothing.
    */
    void (*cleanup)( cson_value * self );
    /**
       POSSIBLE TODOs:

       // Deep copy.
       int (*clone)( cson_value const * self, cson_value ** tgt );

       // Using JS semantics for true/value
       char (*bool_value)( cson_value const * self );

       // memcmp() return value semantics
       int (*compare)( cson_value const * self, cson_value const * other );
     */
};

typedef struct cson_value_api cson_value_api;

/**
   Empty-initialized cson_value_api object.
*/
#define cson_value_api_empty_m {           \
        CSON_TYPE_UNDEF/*typeID*/,         \
        NULL/*cleanup*/\
      }
/**
   Empty-initialized cson_value_api object.
*/
static const cson_value_api cson_value_api_empty = cson_value_api_empty_m;


typedef unsigned int cson_counter_t;
struct cson_value
{
    /** The "vtbl" of type-specific operations. All instances
        of a given logical value type share a single api instance.

        Results are undefined if this value is NULL.
    */
    cson_value_api const * api;

    /** The raw value. Its interpretation depends on the value of the
        api member. Some value types require dynamically-allocated
        memory, so one must always call cson_value_free() to destroy a
        value when it is no longer needed. For stack-allocated values
        (which client could SHOULD NOT USE unless they are intimately
        familiar with the memory management rules and don't mind an
        occasional leak or crash), use cson_value_clean() instead of
        cson_value_free().
    */
    void * value;

    /**
       We use this to allow us to store cson_value instances in
       multiple containers or multiple times within a single container
       (provided no cycles are introduced).

       Notes about the rc implementation:

       - The refcount is for the cson_value instance itself, not its
       value pointer.

       - Instances start out with a refcount of 0 (not 1). Adding them
       to a container will increase the refcount. Cleaning up the container
       will decrement the count.

       - cson_value_free() decrements the refcount (if it is not already
       0) and cleans/frees the value only when the refcount is 0.

       - Some places in the internals add an "extra" reference to
       objects to avoid a premature deletion. Don't try this at home.
    */
    cson_counter_t refcount;
};


/**
   Empty-initialized cson_value object.
*/
#define cson_value_empty_m { &cson_value_api_empty/*api*/, NULL/*value*/, 0/*refcount*/ }
/**
   Empty-initialized cson_value object.
*/
extern const cson_value cson_value_empty;

const cson_value cson_value_empty = cson_value_empty_m;
const cson_parse_opt cson_parse_opt_empty = cson_parse_opt_empty_m;
const cson_output_opt cson_output_opt_empty = cson_output_opt_empty_m;
const cson_object_iterator cson_object_iterator_empty = cson_object_iterator_empty_m;
const cson_buffer cson_buffer_empty = cson_buffer_empty_m;
const cson_parse_info cson_parse_info_empty = cson_parse_info_empty_m;

static void cson_value_destroy_zero_it( cson_value * self );
static void cson_value_destroy_object( cson_value * self );
/**
   If self is-a array then this function destroys its contents,
   else this function does nothing.
*/
static void cson_value_destroy_array( cson_value * self );

static const cson_value_api cson_value_api_null = { CSON_TYPE_NULL, cson_value_destroy_zero_it };
static const cson_value_api cson_value_api_undef = { CSON_TYPE_UNDEF, cson_value_destroy_zero_it };
static const cson_value_api cson_value_api_bool = { CSON_TYPE_BOOL, cson_value_destroy_zero_it };
static const cson_value_api cson_value_api_integer = { CSON_TYPE_INTEGER, cson_value_destroy_zero_it };
static const cson_value_api cson_value_api_double = { CSON_TYPE_DOUBLE, cson_value_destroy_zero_it };
static const cson_value_api cson_value_api_string = { CSON_TYPE_STRING, cson_value_destroy_zero_it };
static const cson_value_api cson_value_api_array = { CSON_TYPE_ARRAY, cson_value_destroy_array };
static const cson_value_api cson_value_api_object = { CSON_TYPE_OBJECT, cson_value_destroy_object };

static const cson_value cson_value_undef = { &cson_value_api_undef, NULL, 0 };
static const cson_value cson_value_null_empty = { &cson_value_api_null, NULL, 0 };
static const cson_value cson_value_bool_empty = { &cson_value_api_bool, NULL, 0 };
static const cson_value cson_value_integer_empty = { &cson_value_api_integer, NULL, 0 };
static const cson_value cson_value_double_empty = { &cson_value_api_double, NULL, 0 };
static const cson_value cson_value_string_empty = { &cson_value_api_string, NULL, 0 };
static const cson_value cson_value_array_empty = { &cson_value_api_array, NULL, 0 };
static const cson_value cson_value_object_empty = { &cson_value_api_object, NULL, 0 };

struct cson_string
{
    unsigned int length;
};
#define cson_string_empty_m {0/*length*/}
static const cson_string cson_string_empty = cson_string_empty_m;



#define CSON_CAST(T,V) ((T*)((V)->value))
#define CSON_VCAST(V) ((cson_value *)(((unsigned char *)(V))-sizeof(cson_value)))
#define CSON_INT(V) ((cson_int_t*)(V)->value)
#define CSON_DBL(V) CSON_CAST(cson_double_t,(V))
#define CSON_STR(V) CSON_CAST(cson_string,(V))
#define CSON_OBJ(V) CSON_CAST(cson_object,(V))
#define CSON_ARRAY(V) CSON_CAST(cson_array,(V))

/**
 
 Holds special shared "constant" (though they are non-const)
 values.
 
*/
static struct CSON_EMPTY_HOLDER_
{
    char trueValue;
    cson_string stringValue;
} CSON_EMPTY_HOLDER = {
    1/*trueValue*/,
    cson_string_empty_m
};

/**
    Indexes into the CSON_SPECIAL_VALUES array.
    
    If this enum changes in any way,
    makes damned sure that CSON_SPECIAL_VALUES is updated
    to match!!!
*/
enum CSON_INTERNAL_VALUES {
    
    CSON_VAL_UNDEF = 0,
    CSON_VAL_NULL = 1,
    CSON_VAL_TRUE = 2,
    CSON_VAL_FALSE = 3,
    CSON_VAL_INT_0 = 4,
    CSON_VAL_DBL_0 = 5,
    CSON_VAL_STR_EMPTY = 6,
    CSON_INTERNAL_VALUES_LENGTH
};

/**
  Some "special" shared cson_value instances.

  These values MUST be initialized in the order specified
  by the CSON_INTERNAL_VALUES enum.
   
  Note that they are not const because they are used as
  shared-allocation objects in non-const contexts. However, the
  public API provides no way to modifying them, and clients who
  modify values directly are subject to The Wrath of Undefined
  Behaviour.
*/
static cson_value CSON_SPECIAL_VALUES[] = {
{ &cson_value_api_undef, NULL, 0 }, /* UNDEF */
{ &cson_value_api_null, NULL, 0 }, /* NULL */
{ &cson_value_api_bool, &CSON_EMPTY_HOLDER.trueValue, 0 }, /* TRUE */
{ &cson_value_api_bool, NULL, 0 }, /* FALSE */
{ &cson_value_api_integer, NULL, 0 }, /* INT_0 */
{ &cson_value_api_double, NULL, 0 }, /* DBL_0 */
{ &cson_value_api_string, &CSON_EMPTY_HOLDER.stringValue, 0 }, /* STR_EMPTY */
{ 0, NULL, 0 }
};


/**
    Returns non-0 (true) if m is one of our special
    "built-in" values, e.g. from CSON_SPECIAL_VALUES and some
    "empty" values.
     
    If this returns true, m MUST NOT be free()d!
 */
static char cson_value_is_builtin( void const * m )
{
    if((m >= (void const *)&CSON_EMPTY_HOLDER)
        && ( m < (void const *)(&CSON_EMPTY_HOLDER+1)))
        return 1;
    else return
        ((m > (void const *)&CSON_SPECIAL_VALUES[0])
        && ( m < (void const *)&CSON_SPECIAL_VALUES[CSON_INTERNAL_VALUES_LENGTH]) )
        ? 1
        : 0;
}

char const * cson_rc_string(int rc)
{
    if(0 == rc) return "OK";
#define CHECK(N) else if(cson_rc.N == rc ) return #N
    CHECK(OK);
    CHECK(ArgError);
    CHECK(RangeError);
    CHECK(TypeError);
    CHECK(IOError);
    CHECK(AllocError);
    CHECK(NYIError);
    CHECK(InternalError);
    CHECK(UnsupportedError);
    CHECK(NotFoundError);
    CHECK(UnknownError);
    CHECK(Parse_INVALID_CHAR);
    CHECK(Parse_INVALID_KEYWORD);
    CHECK(Parse_INVALID_ESCAPE_SEQUENCE);
    CHECK(Parse_INVALID_UNICODE_SEQUENCE);
    CHECK(Parse_INVALID_NUMBER);
    CHECK(Parse_NESTING_DEPTH_REACHED);
    CHECK(Parse_UNBALANCED_COLLECTION);
    CHECK(Parse_EXPECTED_KEY);
    CHECK(Parse_EXPECTED_COLON);
    else return "UnknownError";
#undef CHECK
}

/**
   If CSON_LOG_ALLOC is true then the cson_malloc/realloc/free() routines
   will log a message to stderr.
*/
#define CSON_LOG_ALLOC 0


/**
   CSON_FOSSIL_MODE is only for use in the Fossil
   source tree, so that we can plug in to its allocators.
   We can't do this by, e.g., defining macros for the
   malloc/free funcs because fossil's lack of header files
   means we would have to #include "main.c" here to
   get the declarations.
 */
#if defined(CSON_FOSSIL_MODE)
void *fossil_malloc(size_t n);
void fossil_free(void *p);
void *fossil_realloc(void *p, size_t n);
#  define CSON_MALLOC_IMPL fossil_malloc
#  define CSON_FREE_IMPL fossil_free
#  define CSON_REALLOC_IMPL fossil_realloc
#endif

#if !defined CSON_MALLOC_IMPL
#  define CSON_MALLOC_IMPL malloc
#endif
#if !defined CSON_FREE_IMPL
#  define CSON_FREE_IMPL free
#endif
#if !defined CSON_REALLOC_IMPL
#  define CSON_REALLOC_IMPL realloc
#endif

/**
   A test/debug macro for simulating an OOM after the given number of
   bytes have been allocated.
*/
#define CSON_SIMULATE_OOM 0
#if CSON_SIMULATE_OOM
static unsigned int cson_totalAlloced = 0;
#endif

/** Simple proxy for malloc(). descr is a description of the allocation. */
static void * cson_malloc( size_t n, char const * descr )
{
#if CSON_LOG_ALLOC
    fprintf(stderr, "Allocating %u bytes [%s].\n", (unsigned int)n, descr);
#endif
#if CSON_SIMULATE_OOM
    cson_totalAlloced += n;
    if( cson_totalAlloced > CSON_SIMULATE_OOM )
    {
        return NULL;
    }
#endif
    return CSON_MALLOC_IMPL(n);
}

/** Simple proxy for free(). descr is a description of the memory being freed. */
static void cson_free( void * p, char const * descr )
{
#if CSON_LOG_ALLOC
    fprintf(stderr, "Freeing @%p [%s].\n", p, descr);
#endif
    if( !cson_value_is_builtin(p) )
    {
        CSON_FREE_IMPL( p );
    }
}
/** Simple proxy for realloc(). descr is a description of the (re)allocation. */
static void * cson_realloc( void * hint, size_t n, char const * descr )
{
#if CSON_LOG_ALLOC
    fprintf(stderr, "%sllocating %u bytes [%s].\n",
            hint ? "Rea" : "A",
            (unsigned int)n, descr);
#endif
#if CSON_SIMULATE_OOM
    cson_totalAlloced += n;
    if( cson_totalAlloced > CSON_SIMULATE_OOM )
    {
        return NULL;
    }
#endif
    if( 0==n )
    {
         cson_free(hint, descr);
         return NULL;
    }
    else
    {
        return CSON_REALLOC_IMPL( hint, n );
    }
}


#undef CSON_LOG_ALLOC
#undef CSON_SIMULATE_OOM



/**
   CLIENTS CODE SHOULD NEVER USE THIS because it opens up doors to
   memory leaks if it is not used in very controlled circumstances.
   Users must be very aware of how the underlying memory management
   works.

   Frees any resources owned by val, but does not free val itself
   (which may be stack-allocated). If !val or val->api or
   val->api->cleanup are NULL then this is a no-op.

   If v is a container type (object or array) its children are also
   cleaned up (BUT NOT FREED), recursively.

   After calling this, val will have the special "undefined" type.
*/
static void cson_value_clean( cson_value * val );

/**
   Increments cv's reference count by 1.  As a special case, values
   for which cson_value_is_builtin() returns true are not
   modified. assert()s if (NULL==cv).
*/
static void cson_refcount_incr( cson_value * cv )
{
    assert( NULL != cv );
    if( cson_value_is_builtin( cv ) )
    { /* do nothing: we do not want to modify the shared
         instances.
      */
        return;
    }
    else
    {
        ++cv->refcount;
    }
}

#if 0
int cson_value_refcount_set( cson_value * cv, unsigned short rc )
{
    if( NULL == cv ) return cson_rc.ArgError;
    else
    {
        cv->refcount = rc;
        return 0;
    }
}
#endif

int cson_value_add_reference( cson_value * cv )
{
    if( NULL == cv ) return cson_rc.ArgError;
    else if( (cv->refcount+1) < cv->refcount )
    {
        return cson_rc.RangeError;
    }
    else
    {
        cson_refcount_incr( cv );
        return 0;
    }
}

/**
   If cv is NULL or cson_value_is_builtin(cv) returns true then this
   function does nothing and returns 0, otherwise...  If
   cv->refcount is 0 or 1 then cson_value_clean(cv) is called, cv is
   freed, and 0 is returned. If cv->refcount is any other value then
   it is decremented and the new value is returned.
*/
static cson_counter_t cson_refcount_decr( cson_value * cv )
{
    if( (NULL == cv) || cson_value_is_builtin(cv) ) return 0;
    else if( (0 == cv->refcount) || (0 == --cv->refcount) )
    {
        cson_value_clean(cv);
        cson_free(cv,"cson_value::refcount=0");
        return 0;
    }
    else return cv->refcount;
}

unsigned int cson_string_length_bytes( cson_string const * str )
{
    return str ? str->length : 0;
}


/**
   Fetches v's string value as a non-const string.

   cson_strings are supposed to be immutable, but this form provides
   access to the immutable bits, which are v->length bytes long. A
   length-0 string is returned as NULL from here, as opposed to
   "". (This is a side-effect of the string allocation mechanism.)
   Returns NULL if !v.
*/
static char * cson_string_str(cson_string *v)
{
    /*
      See http://groups.google.com/group/comp.lang.c.moderated/browse_thread/thread/2e0c0df5e8a0cd6a
    */
#if 1
    if( !v || (&CSON_EMPTY_HOLDER.stringValue == v) ) return NULL;
    else return (char *)((unsigned char *)( v+1 ));
#else
    static char empty[2] = {0,0};
    return ( NULL == v )
        ? NULL
        : (v->length
           ? (char *) (((unsigned char *)v) + sizeof(cson_string))
           : empty)
        ;
#endif
}

/**
   Fetches v's string value as a const string.
*/
char const * cson_string_cstr(cson_string const *v)
{
    /*
      See http://groups.google.com/group/comp.lang.c.moderated/browse_thread/thread/2e0c0df5e8a0cd6a
    */
#if 1
    if( ! v ) return NULL;
    else if( v == &CSON_EMPTY_HOLDER.stringValue ) return "";
    else return (char *)((unsigned char *)(v+1));
#else
    return (NULL == v)
        ? NULL
        : (v->length
           ? (char const *) ((unsigned char const *)(v+1))
           : "");
#endif
}


#if 0
/**
   Just like strndup(3), in that neither are C89/C99-standard and both
   are documented in detail in strndup(3).
*/
static char * cson_strdup( char const * src, size_t n )
{
    char * rc = (char *)cson_malloc(n+1, "cson_strdup");
    if( ! rc ) return NULL;
    memset( rc, 0, n+1 );
    rc[n] = 0;
    return strncpy( rc, src, n );
}
#endif

int cson_string_cmp_cstr_n( cson_string const * str, char const * other, unsigned int otherLen )
{
    if( ! other && !str ) return 0;
    else if( other && !str ) return 1;
    else if( str && !other ) return -1;
    else if( !otherLen ) return  str->length ? 1 : 0;
    else if( !str->length ) return otherLen ? -1 : 0;
    else
    {
        unsigned const int max = (otherLen > str->length) ? otherLen : str->length;
        int const rc = strncmp( cson_string_cstr(str), other, max );
        return ( (0 == rc) && (otherLen != str->length) )
            ? (str->length < otherLen) ? -1 : 1
            : rc;
    }
}

int cson_string_cmp_cstr( cson_string const * lhs, char const * rhs )
{
    return cson_string_cmp_cstr_n( lhs, rhs, (rhs&&*rhs) ? strlen(rhs) : 0 );
}
int cson_string_cmp( cson_string const * lhs, cson_string const * rhs )
{
    return cson_string_cmp_cstr_n( lhs, cson_string_cstr(rhs), rhs ? rhs->length : 0 );
}


/**
   If self is not NULL, *self is overwritten to have the undefined
   type. self is not cleaned up or freed.
*/
void cson_value_destroy_zero_it( cson_value * self )
{
    if( self )
    {
        *self = cson_value_undef;
    }
}

/**
   A key/value pair collection.

   Each of these objects owns its key/value pointers, and they
   are cleaned up by cson_kvp_clean().
*/
struct cson_kvp
{
    cson_value * key;
    cson_value * value;
};
#define cson_kvp_empty_m {NULL,NULL}
static const cson_kvp cson_kvp_empty = cson_kvp_empty_m;

/** @def CSON_OBJECT_PROPS_SORT

   If CSON_OBJECT_PROPS_SORT is set to a true value then
   qsort() and bsearch() are used to sort (upon insertion)
   and search cson_object::kvp property lists. This costs us
   a re-sort on each insertion but searching is O(log n)
   average/worst case (and O(1) best-case).

   i'm not yet convinced that the overhead of the qsort() justifies
   the potentially decreased search times - it has not been
   measured. Object property lists tend to be relatively short in
   JSON, and a linear search which uses the cson_string::length
   property as a quick check is quite fast when one compares it with
   the sort overhead required by the bsearch() approach.
*/
#define CSON_OBJECT_PROPS_SORT 0

/** @def CSON_OBJECT_PROPS_SORT_USE_LENGTH

    Don't use this - i'm not sure that it works how i'd like.

    If CSON_OBJECT_PROPS_SORT_USE_LENGTH is true then
    we use string lengths as quick checks when sorting
    property keys. This leads to a non-intuitive sorting
    order but "should" be faster.

    This is ignored if CSON_OBJECT_PROPS_SORT is false.

*/
#define CSON_OBJECT_PROPS_SORT_USE_LENGTH 0

#if CSON_OBJECT_PROPS_SORT

/**
   cson_kvp comparator for use with qsort(). ALMOST compares with
   strcmp() semantics, but it uses the strings' lengths as a quicker
   approach. This might give non-intuitive results, but it's faster.
 */
static int cson_kvp_cmp( void const * lhs, void const * rhs )
{
    cson_kvp const * lk = *((cson_kvp const * const*)lhs);
    cson_kvp const * rk = *((cson_kvp const * const*)rhs);
    cson_string const * l = cson_string_value(lk->key);
    cson_string const * r = cson_string_value(rk->key);
#if CSON_OBJECT_PROPS_SORT_USE_LENGTH
    if( l->length < r->length ) return -1;
    else if( l->length > r->length ) return 1;
    else return strcmp( cson_string_cstr( l ), cson_string_cstr( r ) );
#else
    return strcmp( cson_string_cstr( l ),
                   cson_string_cstr( r ) );
#endif /*CSON_OBJECT_PROPS_SORT_USE_LENGTH*/
}
#endif /*CSON_OBJECT_PROPS_SORT*/


#if CSON_OBJECT_PROPS_SORT
#error "Need to rework this for cson_string-to-cson_value refactoring"
/**
   A bsearch() comparison function which requires that lhs be a (char
   const *) and rhs be-a (cson_kvp const * const *). It compares lhs
   to rhs->key's value, using strcmp() semantics.
 */
static int cson_kvp_cmp_vs_cstr( void const * lhs, void const * rhs )
{
    char const * lk = (char const *)lhs;
    cson_kvp const * rk =
        *((cson_kvp const * const*)rhs)
        ;
#if CSON_OBJECT_PROPS_SORT_USE_LENGTH
    unsigned int llen = strlen(lk);
    if( llen < rk->key->length ) return -1;
    else if( llen > rk->key->length ) return 1;
    else return strcmp( lk, cson_string_cstr( rk->key ) );
#else
    return strcmp( lk, cson_string_cstr( rk->key ) );
#endif /*CSON_OBJECT_PROPS_SORT_USE_LENGTH*/
}
#endif /*CSON_OBJECT_PROPS_SORT*/


struct cson_kvp_list
{
    cson_kvp ** list;
    unsigned int count;
    unsigned int alloced;
};
typedef struct cson_kvp_list cson_kvp_list;
#define cson_kvp_list_empty_m {NULL/*list*/,0/*count*/,0/*alloced*/}
static const cson_kvp_list cson_kvp_list_empty = cson_kvp_list_empty_m;

struct cson_object
{
    cson_kvp_list kvp;
};
/*typedef struct cson_object cson_object;*/
#define cson_object_empty_m { cson_kvp_list_empty_m/*kvp*/ }
static const cson_object cson_object_empty = cson_object_empty_m;

struct cson_value_list
{
    cson_value ** list;
    unsigned int count;
    unsigned int alloced;
};
typedef struct cson_value_list cson_value_list;
#define cson_value_list_empty_m {NULL/*list*/,0/*count*/,0/*alloced*/}
static const cson_value_list cson_value_list_empty = cson_value_list_empty_m;

struct cson_array
{
    cson_value_list list;
};
/*typedef struct cson_array cson_array;*/
#define cson_array_empty_m { cson_value_list_empty_m/*list*/ }
static const cson_array cson_array_empty = cson_array_empty_m;


struct cson_parser
{
    JSON_parser p;
    cson_value * root;
    cson_value * node;
    cson_array stack;
    cson_string * ckey;
    int errNo;
    unsigned int totalKeyCount;
    unsigned int totalValueCount;
};
typedef struct cson_parser cson_parser;
static const cson_parser cson_parser_empty = {
NULL/*p*/,
NULL/*root*/,
NULL/*node*/,
cson_array_empty_m/*stack*/,
NULL/*ckey*/,
0/*errNo*/,
0/*totalKeyCount*/,
0/*totalValueCount*/
};

#if 1
/* The following funcs are declared in generated code (cson_lists.h),
   but we need early access to their decls for the Amalgamation build.
*/
static unsigned int cson_value_list_reserve( cson_value_list * self, unsigned int n );
static unsigned int cson_kvp_list_reserve( cson_kvp_list * self, unsigned int n );
static int cson_kvp_list_append( cson_kvp_list * self, cson_kvp * cp );
static void cson_kvp_list_clean( cson_kvp_list * self,
                                 void (*cleaner)(cson_kvp * obj) );
#if 0
static int cson_value_list_append( cson_value_list * self, cson_value * cp );
static void cson_value_list_clean( cson_value_list * self, void (*cleaner)(cson_value * obj));
static int cson_kvp_list_visit( cson_kvp_list * self,
                                int (*visitor)(cson_kvp * obj, void * visitorState ),
                                void * visitorState );
static int cson_value_list_visit( cson_value_list * self,
                                  int (*visitor)(cson_value * obj, void * visitorState ),
                                  void * visitorState );
#endif
#endif
    
#if 0
#  define LIST_T cson_value_list
#  define VALUE_T cson_value *
#  define VALUE_T_IS_PTR 1
#  define LIST_T cson_kvp_list
#  define VALUE_T cson_kvp *
#  define VALUE_T_IS_PTR 1
#else
#endif

/**
   Allocates a new value of the specified type ownership of it to the
   caller. It must eventually be destroyed, by the caller or its
   owning container, by passing it to cson_value_free() or transfering
   ownership to a container.

   extra is only valid for type CSON_TYPE_STRING, and must be the length
   of the string to allocate + 1 byte (for the NUL).

   The returned value->api member will be set appropriately and
   val->value will be set to point to the memory allocated to hold the
   native value type. Use the internal CSON_CAST() family of macros to
   convert them.

   Returns NULL on allocation error.

   @see cson_value_new_array()
   @see cson_value_new_object()
   @see cson_value_new_string()
   @see cson_value_new_integer()
   @see cson_value_new_double()
   @see cson_value_new_bool()
   @see cson_value_free()
*/
static cson_value * cson_value_new(cson_type_id t, size_t extra);

cson_value * cson_value_new(cson_type_id t, size_t extra)
{
    static const size_t vsz = sizeof(cson_value);
    const size_t sz = vsz + extra;
    size_t tx = 0;
    cson_value def = cson_value_undef;
    cson_value * v = NULL;
    char const * reason = "cson_value_new";
    switch(t)
    {
      case CSON_TYPE_ARRAY:
          assert( 0 == extra );
          def = cson_value_array_empty;
          tx = sizeof(cson_array);
          reason = "cson_value:array";
          break;
      case CSON_TYPE_DOUBLE:
          assert( 0 == extra );
          def = cson_value_double_empty;
          tx = sizeof(cson_double_t);
          reason = "cson_value:double";
          break;
      case CSON_TYPE_INTEGER:
          assert( 0 == extra );
          def = cson_value_integer_empty;
          tx = sizeof(cson_int_t);
          reason = "cson_value:int";
          break;
      case CSON_TYPE_STRING:
          assert( 0 != extra );
          def = cson_value_string_empty;
          tx = sizeof(cson_string);
          reason = "cson_value:string";
          break;
      case CSON_TYPE_OBJECT:
          assert( 0 == extra );
          def = cson_value_object_empty;
          tx = sizeof(cson_object);
          reason = "cson_value:object";
          break;
      default:
          assert(0 && "Unhandled type in cson_value_new()!");
          return NULL;
    }
    assert( def.api->typeID != CSON_TYPE_UNDEF );
    v = (cson_value *)cson_malloc(sz+tx, reason);
    if( v ) {
        *v = def;
        if(tx || extra){
            memset(v+1, 0, tx + extra);
            v->value = (void *)(v+1);
        }
    }
    return v;
}


void cson_value_free(cson_value *v)
{
    cson_refcount_decr( v );
}

#if 0 /* we might actually want this later on. */
/** Returns true if v is not NULL and has the given type ID. */
static char cson_value_is_a( cson_value const * v, cson_type_id is )
{
    return (v && v->api && (v->api->typeID == is)) ? 1 : 0;
}
#endif

#if 0
cson_type_id cson_value_type_id( cson_value const * v )
{
    return (v && v->api) ? v->api->typeID : CSON_TYPE_UNDEF;
}
#endif

char cson_value_is_undef( cson_value const * v )
{
    /**
       This special-case impl is needed because the underlying
       (generic) list operations do not know how to populate
       new entries
     */
    return ( !v || !v->api || (v->api==&cson_value_api_undef))
        ? 1 : 0;
}
#define ISA(T,TID) char cson_value_is_##T( cson_value const * v ) {       \
        /*return (v && v->api) ? cson_value_is_a(v,CSON_TYPE_##TID) : 0;*/ \
        return (v && (v->api == &cson_value_api_##T)) ? 1 : 0; \
    } static const char bogusPlaceHolderForEmacsIndention##TID = CSON_TYPE_##TID
ISA(null,NULL);
ISA(bool,BOOL);
ISA(integer,INTEGER);
ISA(double,DOUBLE);
ISA(string,STRING);
ISA(array,ARRAY);
ISA(object,OBJECT);
#undef ISA
char cson_value_is_number( cson_value const * v )
{
    return cson_value_is_integer(v) || cson_value_is_double(v);
}


void cson_value_clean( cson_value * val )
{
    if( val && val->api && val->api->cleanup )
    {
        if( ! cson_value_is_builtin( val ) )
        {
            cson_counter_t const rc = val->refcount;
            val->api->cleanup(val);
            *val = cson_value_undef;
            val->refcount = rc;
        }
    }
}

static cson_value * cson_value_array_alloc()
{
    cson_value * v = cson_value_new(CSON_TYPE_ARRAY,0);
    if( NULL != v )
    {
        cson_array * ar = CSON_ARRAY(v);
        assert(NULL != ar);
        *ar = cson_array_empty;
    }
    return v;
}

static cson_value * cson_value_object_alloc()
{
    cson_value * v = cson_value_new(CSON_TYPE_OBJECT,0);
    if( NULL != v )
    {
        cson_object * obj = CSON_OBJ(v);
        assert(NULL != obj);
        *obj = cson_object_empty;
    }
    return v;
}

cson_value * cson_value_new_object()
{
    return cson_value_object_alloc();
}

cson_object * cson_new_object()
{
    
    return cson_value_get_object( cson_value_new_object() );
}

cson_value * cson_value_new_array()
{
    return cson_value_array_alloc();
}


cson_array * cson_new_array()
{
    return cson_value_get_array( cson_value_new_array() );
}

/**
   Frees kvp->key and kvp->value and sets them to NULL, but does not free
   kvp. If !kvp then this is a no-op.
*/
static void cson_kvp_clean( cson_kvp * kvp )
{
    if( kvp )
    {
        if(kvp->key)
        {
            cson_value_free(kvp->key);
            kvp->key = NULL;
        }
        if(kvp->value)
        {
            cson_value_free( kvp->value );
            kvp->value = NULL;
        }
    }
}

cson_string * cson_kvp_key( cson_kvp const * kvp )
{
    return kvp ? cson_value_get_string(kvp->key) : NULL;
}
cson_value * cson_kvp_value( cson_kvp const * kvp )
{
    return kvp ? kvp->value : NULL;
}


/**
   Calls cson_kvp_clean(kvp) and then frees kvp.
*/
static void cson_kvp_free( cson_kvp * kvp )
{
    if( kvp )
    {
        cson_kvp_clean(kvp);
        cson_free(kvp,"cson_kvp");
    }
}


/**
   cson_value_api::destroy_value() impl for Object
   values. Cleans up self-owned memory and overwrites
   self to have the undefined value, but does not
   free self.
*/
static void cson_value_destroy_object( cson_value * self )
{
    if(self && self->value) {
        cson_object * obj = (cson_object *)self->value;
        assert( self->value == obj );
        cson_kvp_list_clean( &obj->kvp, cson_kvp_free );
        *self = cson_value_undef;
    }
}

/**
   Cleans up the contents of ar->list, but does not free ar.

   After calling this, ar will have a length of 0.

   If properlyCleanValues is 1 then cson_value_free() is called on
   each non-NULL item, otherwise the outer list is destroyed but the
   individual items are assumed to be owned by someone else and are
   not freed.
*/
static void cson_array_clean( cson_array * ar, char properlyCleanValues )
{
    if( ar )
    {
        unsigned int i = 0;
        cson_value * val = NULL;
        for( ; i < ar->list.count; ++i )
        {
            val = ar->list.list[i];
            if(val)
            {
                ar->list.list[i] = NULL;
                if( properlyCleanValues )
                {
                    cson_value_free( val );
                }
            }
        }
        cson_value_list_reserve(&ar->list,0);
        ar->list = cson_value_list_empty
            /* Pedantic note: reserve(0) already clears the list-specific
               fields, but we do this just in case we ever add new fields
               to cson_value_list which are not used in the reserve() impl.
             */
            ;
    }
}

/**
   cson_value_api::destroy_value() impl for Array
   values. Cleans up self-owned memory and overwrites
   self to have the undefined value, but does not
   free self.
*/
static void cson_value_destroy_array( cson_value * self )
{
    cson_array * ar = cson_value_get_array(self);
    if(ar) {
        assert( self->value == ar );
        cson_array_clean( ar, 1 );
        *self = cson_value_undef;
    }
}

int cson_buffer_fill_from( cson_buffer * dest, cson_data_source_f src, void * state )
{
    int rc;
    enum { BufSize = 1024 * 4 };
    char rbuf[BufSize];
    size_t total = 0;
    unsigned int rlen = 0;
    if( ! dest || ! src ) return cson_rc.ArgError;
    dest->used = 0;
    while(1)
    {
        rlen = BufSize;
        rc = src( state, rbuf, &rlen );
        if( rc ) break;
        total += rlen;
        if( dest->capacity < (total+1) )
        {
            rc = cson_buffer_reserve( dest, total + 1);
            if( 0 != rc ) break;
        }
        memcpy( dest->mem + dest->used, rbuf, rlen );
        dest->used += rlen;
        if( rlen < BufSize ) break;
    }
    if( !rc && dest->used )
    {
        assert( dest->used < dest->capacity );
        dest->mem[dest->used] = 0;
    }
    return rc;
}

int cson_data_source_FILE( void * state, void * dest, unsigned int * n )
{
    FILE * f = (FILE*) state;
    if( ! state || ! n || !dest ) return cson_rc.ArgError;
    else if( !*n ) return cson_rc.RangeError;
    *n = (unsigned int)fread( dest, 1, *n, f );
    if( !*n )
    {
        return feof(f) ? 0 : cson_rc.IOError;
    }
    return 0;
}

int cson_parse_FILE( cson_value ** tgt, FILE * src,
                     cson_parse_opt const * opt, cson_parse_info * err )
{
    return cson_parse( tgt, cson_data_source_FILE, src, opt, err );
}


int cson_value_fetch_bool( cson_value const * val, char * v )
{
    /**
       FIXME: move the to-bool operation into cson_value_api, like we
       do in the C++ API.
     */
    if( ! val || !val->api ) return cson_rc.ArgError;
    else
    {
        int rc = 0;
        char b = 0;
        switch( val->api->typeID )
        {
          case CSON_TYPE_ARRAY:
          case CSON_TYPE_OBJECT:
              b = 1;
              break;
          case CSON_TYPE_STRING: {
              char const * str = cson_string_cstr(cson_value_get_string(val));
              b = (str && *str) ? 1 : 0;
              break;
          }
          case CSON_TYPE_UNDEF:
          case CSON_TYPE_NULL:
              break;
          case CSON_TYPE_BOOL:
              b = (NULL==val->value) ? 0 : 1;
              break;
          case CSON_TYPE_INTEGER: {
              cson_int_t i = 0;
              cson_value_fetch_integer( val, &i );
              b = i ? 1 : 0;
              break;
          }
          case CSON_TYPE_DOUBLE: {
              cson_double_t d = 0.0;
              cson_value_fetch_double( val, &d );
              b = (0.0==d) ? 0 : 1;
              break;
          }
          default:
              rc = cson_rc.TypeError;
              break;
        }
        if( v ) *v = b;
        return rc;
    }
}

char cson_value_get_bool( cson_value const * val )
{
    char i = 0;
    cson_value_fetch_bool( val, &i );
    return i;
}

int cson_value_fetch_integer( cson_value const * val, cson_int_t * v )
{
    if( ! val || !val->api ) return cson_rc.ArgError;
    else
    {
        cson_int_t i = 0;
        int rc = 0;
        switch(val->api->typeID)
        {
            case CSON_TYPE_UNDEF: 
            case CSON_TYPE_NULL:
              i = 0;
              break;
            case CSON_TYPE_BOOL: {
              char b = 0;
              cson_value_fetch_bool( val, &b );
              i = b;
              break;
            }
            case CSON_TYPE_INTEGER: {
                cson_int_t const * x = CSON_INT(val);
                if(!x)
                {
                    assert( val == &CSON_SPECIAL_VALUES[CSON_VAL_INT_0] );
                }
                i = x ? *x : 0;
                break;
            }
            case CSON_TYPE_DOUBLE: {
              cson_double_t d = 0.0;
              cson_value_fetch_double( val, &d );
              i = (cson_int_t)d;
              break;
            }
            case CSON_TYPE_STRING:
            case CSON_TYPE_ARRAY:
            case CSON_TYPE_OBJECT:
            default:
              break;
        }
        if(v) *v = i;
        return rc;
    }
}

cson_int_t cson_value_get_integer( cson_value const * val )
{
    cson_int_t i = 0;
    cson_value_fetch_integer( val, &i );
    return i;
}

int cson_value_fetch_double( cson_value const * val, cson_double_t * v )
{
    if( ! val || !val->api ) return cson_rc.ArgError;
    else
    {
        cson_double_t d = 0.0;
        int rc = 0;
        switch(val->api->typeID)
        {
          case CSON_TYPE_UNDEF: 
          case CSON_TYPE_NULL:
              d = 0;
              break;
          case CSON_TYPE_BOOL: {
              char b = 0;
              cson_value_fetch_bool( val, &b );
              d = b ? 1.0 : 0.0;
              break;
          }
          case CSON_TYPE_INTEGER: {
              cson_int_t i = 0;
              cson_value_fetch_integer( val, &i );
              d = i;
              break;
          }
          case CSON_TYPE_DOUBLE: {
              cson_double_t const* dv = CSON_DBL(val);
              d = dv ? *dv : 0.0;
              break;
          }
          default:
              rc = cson_rc.TypeError;
              break;
        }
        if(v) *v = d;
        return rc;
    }
}

cson_double_t cson_value_get_double( cson_value const * val )
{
    cson_double_t i = 0.0;
    cson_value_fetch_double( val, &i );
    return i;
}

int cson_value_fetch_string( cson_value const * val, cson_string ** dest )
{
    if( ! val || ! dest ) return cson_rc.ArgError;
    else if( ! cson_value_is_string(val) ) return cson_rc.TypeError;
    else
    {
        if( dest ) *dest = CSON_STR(val);
        return 0;
    }
}

cson_string * cson_value_get_string( cson_value const * val )
{
    cson_string * rc = NULL;
    cson_value_fetch_string( val, &rc );
    return rc;
}

char const * cson_value_get_cstr( cson_value const * val )
{
    return cson_string_cstr( cson_value_get_string(val) );
}

int cson_value_fetch_object( cson_value const * val, cson_object ** obj )
{
    if( ! val ) return cson_rc.ArgError;
    else if( ! cson_value_is_object(val) ) return cson_rc.TypeError;
    else
    {
        if(obj) *obj = CSON_OBJ(val);
        return 0;
    }
}
cson_object * cson_value_get_object( cson_value const * v )
{
    cson_object * obj = NULL;
    cson_value_fetch_object( v, &obj );
    return obj;
}

int cson_value_fetch_array( cson_value const * val, cson_array ** ar)
{
    if( ! val ) return cson_rc.ArgError;
    else if( !cson_value_is_array(val) ) return cson_rc.TypeError;
    else
    {
        if(ar) *ar = CSON_ARRAY(val);
        return 0;
    }
}

cson_array * cson_value_get_array( cson_value const * v )
{
    cson_array * ar = NULL;
    cson_value_fetch_array( v, &ar );
    return ar;
}

cson_kvp * cson_kvp_alloc()
{
    cson_kvp * kvp = (cson_kvp*)cson_malloc(sizeof(cson_kvp),"cson_kvp");
    if( kvp )
    {
        *kvp = cson_kvp_empty;
    }
    return kvp;
}



int cson_array_append( cson_array * ar, cson_value * v )
{
    if( !ar || !v ) return cson_rc.ArgError;
    else if( (ar->list.count+1) < ar->list.count ) return cson_rc.RangeError;
    else
    {
        if( !ar->list.alloced || (ar->list.count == ar->list.alloced-1))
        {
            unsigned int const n = ar->list.count ? (ar->list.count*2) : 7;
            if( n > cson_value_list_reserve( &ar->list, n ) )
            {
                return cson_rc.AllocError;
            }
        }
        return cson_array_set( ar, ar->list.count, v );
    }
}

#if 0
/**
   Removes and returns the last value from the given array,
   shrinking its size by 1. Returns NULL if ar is NULL,
   ar->list.count is 0, or the element at that index is NULL.
   

   If removeRef is true then cson_value_free() is called to remove
   ar's reference count for the value. In that case NULL is returned,
   even if the object still has live references. If removeRef is false
   then the caller takes over ownership of that reference count point.

   If removeRef is false then the caller takes over ownership
   of the return value, otherwise ownership is effectively
   determined by any remaining references for the returned
   value.
*/
static cson_value * cson_array_pop_back( cson_array * ar,
                                         char removeRef )
{
    if( !ar ) return NULL;
    else if( ! ar->list.count ) return NULL;
    else
    {
        unsigned int const ndx = --ar->list.count;
        cson_value * v = ar->list.list[ndx];
        ar->list.list[ndx] = NULL;
        if( removeRef )
        {
            cson_value_free( v );
            v = NULL;
        }
        return v;
    }
}
#endif

cson_value * cson_value_new_bool( char v )
{
    return v ? &CSON_SPECIAL_VALUES[CSON_VAL_TRUE] : &CSON_SPECIAL_VALUES[CSON_VAL_FALSE];
}

cson_value * cson_value_true()
{
    return &CSON_SPECIAL_VALUES[CSON_VAL_TRUE];
}
cson_value * cson_value_false()
{
    return &CSON_SPECIAL_VALUES[CSON_VAL_FALSE];
}

cson_value * cson_value_null()
{
    return &CSON_SPECIAL_VALUES[CSON_VAL_NULL];
}

cson_value * cson_new_int( cson_int_t v )
{
    return cson_value_new_integer(v);
}

cson_value * cson_value_new_integer( cson_int_t v )
{
    if( 0 == v ) return &CSON_SPECIAL_VALUES[CSON_VAL_INT_0];
    else
    {
        cson_value * c = cson_value_new(CSON_TYPE_INTEGER,0);

        if( c )
        {
            *CSON_INT(c) = v;
        }
        return c;
    }
}

cson_value * cson_new_double( cson_double_t v )
{
    return cson_value_new_double(v);
}

cson_value * cson_value_new_double( cson_double_t v )
{
    if( 0.0 == v ) return &CSON_SPECIAL_VALUES[CSON_VAL_DBL_0];
    else
    {
        cson_value * c = cson_value_new(CSON_TYPE_DOUBLE,0);
        if( c )
        {
            *CSON_DBL(c) = v;
        }
        return c;
    }
}

cson_string * cson_new_string(char const * str, unsigned int len)
{
    if( !str || !*str || !len ) return &CSON_EMPTY_HOLDER.stringValue;
    else
    {
        cson_value * c = cson_value_new(CSON_TYPE_STRING, len + 1/*NUL byte*/);
        cson_string * s = NULL;
        if( c )
        {
            char * dest = NULL;
            s = CSON_STR(c);
            *s = cson_string_empty;
            assert( NULL != s );
            s->length = len;
            dest = cson_string_str(s);
            assert( NULL != dest );
            memcpy( dest, str, len );
            dest[len] = 0;
        }
        return s;
    }
}

cson_value * cson_value_new_string( char const * str, unsigned int len )
{
    return cson_string_value( cson_new_string(str, len) );
}

int cson_array_value_fetch( cson_array const * ar, unsigned int pos, cson_value ** v )
{
    if( !ar) return cson_rc.ArgError;
    if( pos >= ar->list.count ) return cson_rc.RangeError;
    else
    {
        if(v) *v = ar->list.list[pos];
        return 0;
    }
}

cson_value * cson_array_get( cson_array const * ar, unsigned int pos )
{
    cson_value *v = NULL;
    cson_array_value_fetch(ar, pos, &v);
    return v;
}

int cson_array_length_fetch( cson_array const * ar, unsigned int * v )
{
    if( ! ar || !v ) return cson_rc.ArgError;
    else
    {
        if(v) *v = ar->list.count;
        return 0;
    }
}

unsigned int cson_array_length_get( cson_array const * ar )
{
    unsigned int i = 0;
    cson_array_length_fetch(ar, &i);
    return i;
}

int cson_array_reserve( cson_array * ar, unsigned int size )
{
    if( ! ar ) return cson_rc.ArgError;
    else if( size <= ar->list.alloced )
    {
        /* We don't want to introduce a can of worms by trying to
           handle the cleanup from here.
        */
        return 0;
    }
    else
    {
        return (ar->list.alloced > cson_value_list_reserve( &ar->list, size ))
            ? cson_rc.AllocError
            : 0
            ;
    }
}

int cson_array_set( cson_array * ar, unsigned int ndx, cson_value * v )
{
    if( !ar || !v ) return cson_rc.ArgError;
    else if( (ndx+1) < ndx) /* overflow */return cson_rc.RangeError;
    else
    {
        unsigned const int len = cson_value_list_reserve( &ar->list, ndx+1 );
        if( len <= ndx ) return cson_rc.AllocError;
        else
        {
            cson_value * old = ar->list.list[ndx];
            if( old )
            {
                if(old == v) return 0;
                else cson_value_free(old);
            }
            cson_refcount_incr( v );
            ar->list.list[ndx] = v;
            if( ndx >= ar->list.count )
            {
                ar->list.count = ndx+1;
            }
            return 0;
        }
    }
}

/** @internal

   Searchs for the given key in the given object.

   Returns the found item on success, NULL on error.  If ndx is not
   NULL, it is set to the index (in obj->kvp.list) of the found
   item. *ndx is not modified if no entry is found.
*/
static cson_kvp * cson_object_search_impl( cson_object const * obj, char const * key, unsigned int * ndx )
{
    if( obj && key && *key && obj->kvp.count)
    {
#if CSON_OBJECT_PROPS_SORT
        cson_kvp ** s = (cson_kvp**)
            bsearch( key, obj->kvp.list,
                     obj->kvp.count, sizeof(cson_kvp*),
                     cson_kvp_cmp_vs_cstr );
        if( ndx && s )
        { /* index of found record is required by
             cson_object_unset(). Calculate the offset based on s...*/
#if 0
            *ndx = (((unsigned char const *)s - ((unsigned char const *)obj->kvp.list))
                   / sizeof(cson_kvp*));
#else
            *ndx = s - obj->kvp.list;
#endif
        }
        return s ? *s : NULL;
#else
        cson_kvp_list const * li = &obj->kvp;
        unsigned int i = 0;
        cson_kvp * kvp;
        const unsigned int klen = strlen(key);
        for( ; i < li->count; ++i )
        {
            cson_string const * sKey;
            kvp = li->list[i];
            assert( kvp && kvp->key );
            sKey = cson_value_get_string(kvp->key);
            assert(sKey);
            if( sKey->length != klen ) continue;
            else if(0==strcmp(key,cson_string_cstr(sKey)))
            {
                if(ndx) *ndx = i;
                return kvp;
            }
        }
#endif
    }
    return NULL;
}

cson_value * cson_object_get( cson_object const * obj, char const * key )
{
    cson_kvp * kvp = cson_object_search_impl( obj, key, NULL );
    return kvp ? kvp->value : NULL;
}

cson_value * cson_object_get_s( cson_object const * obj, cson_string const *key )
{
    cson_kvp * kvp = cson_object_search_impl( obj, cson_string_cstr(key), NULL );
    return kvp ? kvp->value : NULL;
}


#if CSON_OBJECT_PROPS_SORT
static void cson_object_sort_props( cson_object * obj )
{
    assert( NULL != obj );
    if( obj->kvp.count )
    {
        qsort( obj->kvp.list, obj->kvp.count, sizeof(cson_kvp*),
               cson_kvp_cmp );
    }

}
#endif    

int cson_object_unset( cson_object * obj, char const * key )
{
    if( ! obj || !key || !*key ) return cson_rc.ArgError;
    else
    {
        unsigned int ndx = 0;
        cson_kvp * kvp = cson_object_search_impl( obj, key, &ndx );
        if( ! kvp )
        {
            return cson_rc.NotFoundError;
        }
        assert( obj->kvp.count > 0 );
        assert( obj->kvp.list[ndx] == kvp );
        cson_kvp_free( kvp );
        obj->kvp.list[ndx] = NULL;
        { /* if my brain were bigger i'd use memmove(). */
            unsigned int i = ndx;
            for( ; i < obj->kvp.count; ++i )
            {
                obj->kvp.list[i] =
                    (i < (obj->kvp.alloced-1))
                    ? obj->kvp.list[i+1]
                    : NULL;
            }
        }
        obj->kvp.list[--obj->kvp.count] = NULL;
#if CSON_OBJECT_PROPS_SORT
        cson_object_sort_props( obj );
#endif
        return 0;
    }
}

int cson_object_set_s( cson_object * obj, cson_string * key, cson_value * v )
{
    if( !obj || !key ) return cson_rc.ArgError;
    else if( NULL == v ) return cson_object_unset( obj, cson_string_cstr(key) );
    else
    {
        char const * cKey;
        cson_value * vKey;
        cson_kvp * kvp;
        vKey = cson_string_value(key);
        assert(vKey && (key==CSON_STR(vKey)));
        if( vKey == CSON_VCAST(obj) ){
            return cson_rc.ArgError;
        }
        cKey =  cson_string_cstr(key);
        kvp = cson_object_search_impl( obj, cKey, NULL );
        if( kvp )
        { /* "I told 'em we've already got one!" */
            if( kvp->key != vKey ){
                cson_value_free( kvp->key );
                cson_refcount_incr(vKey);
                kvp->key = vKey;
            }
            if(kvp->value != v){
                cson_value_free( kvp->value );
                cson_refcount_incr( v );
                kvp->value = v;
            }
            return 0;
        }
        if( !obj->kvp.alloced || (obj->kvp.count == obj->kvp.alloced-1))
        {
            unsigned int const n = obj->kvp.count ? (obj->kvp.count*2) : 6;
            if( n > cson_kvp_list_reserve( &obj->kvp, n ) )
            {
                return cson_rc.AllocError;
            }
        }
        { /* insert new item... */
            int rc = 0;
            kvp = cson_kvp_alloc();
            if( ! kvp )
            {
                return cson_rc.AllocError;
            }
            rc = cson_kvp_list_append( &obj->kvp, kvp );
            if( 0 != rc )
            {
                cson_kvp_free(kvp);
            }
            else
            {
                cson_refcount_incr(vKey);
                cson_refcount_incr(v);
                kvp->key = vKey;
                kvp->value = v;
#if CSON_OBJECT_PROPS_SORT
                cson_object_sort_props( obj );
#endif
            }
            return rc;
        }
    }

}
int cson_object_set( cson_object * obj, char const * key, cson_value * v )
{
    if( ! obj || !key || !*key ) return cson_rc.ArgError;
    else if( NULL == v )
    {
        return cson_object_unset( obj, key );
    }
    else
    {
        cson_string * cs = cson_new_string(key,strlen(key));
        if(!cs) return cson_rc.AllocError;
        else
        {
            int const rc = cson_object_set_s(obj, cs, v);
            if(rc) cson_value_free(cson_string_value(cs));
            return rc;
        }
    }
}

cson_value * cson_object_take( cson_object * obj, char const * key )
{
    if( ! obj || !key || !*key ) return NULL;
    else
    {
        /* FIXME: this is 90% identical to cson_object_unset(),
           only with different refcount handling.
           Consolidate them.
        */
        unsigned int ndx = 0;
        cson_kvp * kvp = cson_object_search_impl( obj, key, &ndx );
        cson_value * rc = NULL;
        if( ! kvp )
        {
            return NULL;
        }
        assert( obj->kvp.count > 0 );
        assert( obj->kvp.list[ndx] == kvp );
        rc = kvp->value;
        assert( rc );
        kvp->value = NULL;
        cson_kvp_free( kvp );
        assert( rc->refcount > 0 );
        --rc->refcount;
        obj->kvp.list[ndx] = NULL;
        { /* if my brain were bigger i'd use memmove(). */
            unsigned int i = ndx;
            for( ; i < obj->kvp.count; ++i )
            {
                obj->kvp.list[i] =
                    (i < (obj->kvp.alloced-1))
                    ? obj->kvp.list[i+1]
                    : NULL;
            }
        }
        obj->kvp.list[--obj->kvp.count] = NULL;
#if CSON_OBJECT_PROPS_SORT
        cson_object_sort_props( obj );
#endif
        return rc;
    }
}
/** @internal

   If p->node is-a Object then value is inserted into the object
   using p->key. In any other case cson_rc.InternalError is returned.

   Returns cson_rc.AllocError if an allocation fails.

   Returns 0 on success. On error, parsing must be ceased immediately.
   
   Ownership of val is ALWAYS TRANSFERED to this function. If this
   function fails, val will be cleaned up and destroyed. (This
   simplifies error handling in the core parser.)
*/
static int cson_parser_set_key( cson_parser * p, cson_value * val )
{
    assert( p && val );

    if( p->ckey && cson_value_is_object(p->node) )
    {
        int rc;
        cson_object * obj = cson_value_get_object(p->node);
        cson_kvp * kvp = NULL;
        assert( obj && (p->node->value == obj) );
        /**
           FIXME? Use cson_object_set() instead of our custom
           finagling with the object? We do it this way to avoid an
           extra alloc/strcpy of the key data.
        */
        if( !obj->kvp.alloced || (obj->kvp.count == obj->kvp.alloced-1))
        {
            if( obj->kvp.alloced > cson_kvp_list_reserve( &obj->kvp, obj->kvp.count ? (obj->kvp.count*2) : 5 ) )
            {
                cson_value_free(val);
                return cson_rc.AllocError;
            }
        }
        kvp = cson_kvp_alloc();
        if( ! kvp )
        {
            cson_value_free(val);
            return cson_rc.AllocError;
        }
        kvp->key = cson_string_value(p->ckey)/*transfer ownership*/;
        p->ckey = NULL;
        kvp->value = val;
        cson_refcount_incr( val );
        rc = cson_kvp_list_append( &obj->kvp, kvp );
        if( 0 != rc )
        {
            cson_kvp_free( kvp );
        }
        else
        {
            ++p->totalValueCount;
        }
        return rc;
    }
    else
    {
        if(val) cson_value_free(val);
        return p->errNo = cson_rc.InternalError;
    }

}

/** @internal

    Pushes val into the current object/array parent node, depending on the
    internal state of the parser.

    Ownership of val is always transfered to this function, regardless of
    success or failure.

    Returns 0 on success. On error, parsing must be ceased immediately.
*/
static int cson_parser_push_value( cson_parser * p, cson_value * val )
{
    if( p->ckey )
    { /* we're in Object mode */
        assert( cson_value_is_object( p->node ) );
        return cson_parser_set_key( p, val );
    }
    else if( cson_value_is_array( p->node ) )
    { /* we're in Array mode */
        cson_array * ar = cson_value_get_array( p->node );
        int rc;
        assert( ar && (ar == p->node->value) );
        rc = cson_array_append( ar, val );
        if( 0 != rc )
        {
            cson_value_free(val);
        }
        else
        {
            ++p->totalValueCount;
        }
        return rc;
    }
    else
    { /* WTF? */
        assert( 0 && "Internal error in cson_parser code" );
        return p->errNo = cson_rc.InternalError;
    }
}

/**
   Callback for JSON_parser API. Reminder: it returns 0 (meaning false)
   on error!
*/
static int cson_parse_callback( void * cx, int type, JSON_value const * value )
{
    cson_parser * p = (cson_parser *)cx;
    int rc = 0;
#define ALLOC_V(T,V) cson_value * v = cson_value_new_##T(V); if( ! v ) { rc = cson_rc.AllocError; break; }
    switch(type) {
      case JSON_T_ARRAY_BEGIN:
      case JSON_T_OBJECT_BEGIN: {
          cson_value * obja = (JSON_T_ARRAY_BEGIN == type)
              ? cson_value_new_array()
              : cson_value_new_object();
          if( ! obja )
          {
              p->errNo = cson_rc.AllocError;
              return 0;
          }
          if( 0 != rc ) break;
          if( ! p->root )
          {
              p->root = p->node = obja;
              rc = cson_array_append( &p->stack, obja );
              if( 0 != rc )
              { /* work around a (potential) corner case in the cleanup code. */
                  cson_value_free( p->root );
                  p->root = NULL;
              }
              else
              {
                  cson_refcount_incr( p->root )
                      /* simplifies cleanup later on. */
                      ;
                  ++p->totalValueCount;
              }
          }
          else
          {
              rc = cson_array_append( &p->stack, obja );
              if( 0 == rc ) rc = cson_parser_push_value( p, obja );
              if( 0 == rc ) p->node = obja;
          }
          break;
      }
      case JSON_T_ARRAY_END:
      case JSON_T_OBJECT_END: {
          if( 0 == p->stack.list.count )
          {
              rc = cson_rc.RangeError;
              break;
          }
#if CSON_OBJECT_PROPS_SORT
          if( cson_value_is_object(p->node) )
          {/* kludge: the parser uses custom cson_object property
              insertion as a malloc/strcpy-reduction optimization.
              Because of that, we have to sort the property list
              ourselves...
           */
              cson_object * obj = cson_value_get_object(p->node);
              assert( NULL != obj );
              cson_object_sort_props( obj );
          }
#endif

#if 1
          /* Reminder: do not use cson_array_pop_back( &p->stack )
             because that will clean up the object, and we don't want
             that.  We just want to forget this reference
             to it. The object is either the root or was pushed into
             an object/array in the parse tree (and is owned by that
             object/array).
          */
          --p->stack.list.count;
          assert( p->node == p->stack.list.list[p->stack.list.count] );
          cson_refcount_decr( p->node )
              /* p->node might be owned by an outer object but we
                 need to remove the list's reference. For the
                 root node we manually add a reference to
                 avoid a special case here. Thus when we close
                 the root node, its refcount is still 1.
              */;
          p->stack.list.list[p->stack.list.count] = NULL;
          if( p->stack.list.count )
          {
              p->node = p->stack.list.list[p->stack.list.count-1];
          }
          else
          {
              p->node = p->root;
          }
#else
          /*
             Causing a leak?
           */
          cson_array_pop_back( &p->stack, 1 );
          if( p->stack.list.count )
          {
              p->node = p->stack.list.list[p->stack.list.count-1];
          }
          else
          {
              p->node = p->root;
          }
          assert( p->node && (1==p->node->refcount) );
#endif
          break;
      }
      case JSON_T_INTEGER: {
          ALLOC_V(integer, value->vu.integer_value );
          rc = cson_parser_push_value( p, v );
          break;
      }
      case JSON_T_FLOAT: {
          ALLOC_V(double, value->vu.float_value );
          rc =  cson_parser_push_value( p, v );
          break;
      }
      case JSON_T_NULL: {
          rc = cson_parser_push_value( p, cson_value_null() );
          break;
      }
      case JSON_T_TRUE: {
          rc = cson_parser_push_value( p, cson_value_true() );
          break;
      }
      case JSON_T_FALSE: {
          rc = cson_parser_push_value( p, cson_value_false() );
          break;
      }
      case JSON_T_KEY: {
          assert(!p->ckey);
          p->ckey = cson_new_string( value->vu.str.value, value->vu.str.length );
          if( ! p->ckey )
          {
              rc = cson_rc.AllocError;
              break;
          }
          ++p->totalKeyCount;
          break;
      }
      case JSON_T_STRING: {
          cson_value * v = cson_value_new_string( value->vu.str.value, value->vu.str.length );
          rc = ( NULL == v ) 
            ? cson_rc.AllocError
            : cson_parser_push_value( p, v );
          break;
      }
      default:
          assert(0);
          rc = cson_rc.InternalError;
          break;
    }
#undef ALLOC_V
    return ((p->errNo = rc)) ? 0 : 1;
}


/**
   Converts a JSON_error code to one of the cson_rc values.
*/
static int cson_json_err_to_rc( JSON_error jrc )
{
    switch(jrc)
    {
      case JSON_E_NONE: return 0;
      case JSON_E_INVALID_CHAR: return cson_rc.Parse_INVALID_CHAR;
      case JSON_E_INVALID_KEYWORD: return cson_rc.Parse_INVALID_KEYWORD;
      case JSON_E_INVALID_ESCAPE_SEQUENCE: return cson_rc.Parse_INVALID_ESCAPE_SEQUENCE;
      case JSON_E_INVALID_UNICODE_SEQUENCE: return cson_rc.Parse_INVALID_UNICODE_SEQUENCE;
      case JSON_E_INVALID_NUMBER: return cson_rc.Parse_INVALID_NUMBER;
      case JSON_E_NESTING_DEPTH_REACHED: return cson_rc.Parse_NESTING_DEPTH_REACHED;
      case JSON_E_UNBALANCED_COLLECTION: return cson_rc.Parse_UNBALANCED_COLLECTION;
      case JSON_E_EXPECTED_KEY: return cson_rc.Parse_EXPECTED_KEY;
      case JSON_E_EXPECTED_COLON: return cson_rc.Parse_EXPECTED_COLON;
      case JSON_E_OUT_OF_MEMORY: return cson_rc.AllocError;
      default:
          return cson_rc.InternalError;
    }
}

/** @internal

   Cleans up all contents of p but does not free p.

   To properly take over ownership of the parser's root node on a
   successful parse:

   - Copy p->root's pointer and set p->root to NULL.
   - Eventually free up p->root with cson_value_free().
   
   If you do not set p->root to NULL, p->root will be freed along with
   any other items inserted into it (or under it) during the parsing
   process.
*/
static int cson_parser_clean( cson_parser * p )
{
    if( ! p ) return cson_rc.ArgError;
    else
    {
        if( p->p )
        {
            delete_JSON_parser(p->p);
            p->p = NULL;
        }
        if( p->ckey ){
            cson_value_free(cson_string_value(p->ckey));
        }
        cson_array_clean( &p->stack, 1 );
        if( p->root )
        {
            cson_value_free( p->root );
        }
        *p = cson_parser_empty;
        return 0;
    }
}


int cson_parse( cson_value ** tgt, cson_data_source_f src, void * state,
                cson_parse_opt const * opt_, cson_parse_info * info_ )
{
    unsigned char ch[2] = {0,0};
    cson_parse_opt const opt = opt_ ? *opt_ : cson_parse_opt_empty;
    int rc = 0;
    unsigned int len = 1;
    cson_parse_info info = info_ ? *info_ : cson_parse_info_empty;
    cson_parser p = cson_parser_empty;
    if( ! tgt || ! src ) return cson_rc.ArgError;
    
    {
        JSON_config jopt = {0};
        init_JSON_config( &jopt );
        jopt.allow_comments = opt.allowComments;
        jopt.depth = opt.maxDepth;
        jopt.callback_ctx = &p;
        jopt.handle_floats_manually = 0;
        jopt.callback = cson_parse_callback;
        p.p = new_JSON_parser(&jopt);
        if( ! p.p )
        {
            return cson_rc.AllocError;
        }
    }

    do
    { /* FIXME: buffer the input in multi-kb chunks. */
        len = 1;
        ch[0] = 0;
        rc = src( state, ch, &len );
        if( 0 != rc ) break;
        else if( !len /* EOF */ ) break;
        ++info.length;
        if('\n' == ch[0])
        {
            ++info.line;
            info.col = 0;
        }
        if( ! JSON_parser_char(p.p, ch[0]) )
        {
            rc = cson_json_err_to_rc( JSON_parser_get_last_error(p.p) );
            if(0==rc) rc = p.errNo;
            if(0==rc) rc = cson_rc.InternalError;
            info.errorCode = rc;
            break;
        }
        if( '\n' != ch[0]) ++info.col;
    } while(1);
    if( info_ )
    {
        info.totalKeyCount = p.totalKeyCount;
        info.totalValueCount = p.totalValueCount;
        *info_ = info;
    }
    if( 0 != rc )
    {
        cson_parser_clean(&p);
        return rc;
    }
    if( ! JSON_parser_done(p.p) )
    {
        rc = cson_json_err_to_rc( JSON_parser_get_last_error(p.p) );
        cson_parser_clean(&p);
        if(0==rc) rc = p.errNo;
        if(0==rc) rc = cson_rc.InternalError;
    }
    else
    {
        cson_value * root = p.root;
        p.root = NULL;
        cson_parser_clean(&p);
        if( root )
        {
            assert( (1 == root->refcount) && "Detected memory mismanagement in the parser." );
            root->refcount = 0
                /* HUGE KLUDGE! Avoids having one too many references
                   in some client code, leading to a leak. Here we're
                   accommodating a memory management workaround in the
                   parser code which manually adds a reference to the
                   root node to keep it from being cleaned up
                   prematurely.
                */;
            *tgt = root;
        }
        else
        { /* then can happen on empty input. */
            rc = cson_rc.UnknownError;
        }
    }
    return rc;
}

/**
   The UTF code was originally taken from sqlite3's public-domain
   source code (http://sqlite.org), modified only slightly for use
   here. This code generates some "possible data loss" warnings on
   MSVC, but if this code is good enough for sqlite3 then it's damned
   well good enough for me, so we disable that warning for Windows
   builds.
*/

/*
** This lookup table is used to help decode the first byte of
** a multi-byte UTF8 character.
*/
static const unsigned char cson_utfTrans1[] = {
  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
  0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
  0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  0x00, 0x01, 0x02, 0x03, 0x00, 0x01, 0x00, 0x00
};


/*
** Translate a single UTF-8 character.  Return the unicode value.
**
** During translation, assume that the byte that zTerm points
** is a 0x00.
**
** Write a pointer to the next unread byte back into *pzNext.
**
** Notes On Invalid UTF-8:
**
**  *  This routine never allows a 7-bit character (0x00 through 0x7f) to
**     be encoded as a multi-byte character.  Any multi-byte character that
**     attempts to encode a value between 0x00 and 0x7f is rendered as 0xfffd.
**
**  *  This routine never allows a UTF16 surrogate value to be encoded.
**     If a multi-byte character attempts to encode a value between
**     0xd800 and 0xe000 then it is rendered as 0xfffd.
**
**  *  Bytes in the range of 0x80 through 0xbf which occur as the first
**     byte of a character are interpreted as single-byte characters
**     and rendered as themselves even though they are technically
**     invalid characters.
**
**  *  This routine accepts an infinite number of different UTF8 encodings
**     for unicode values 0x80 and greater.  It do not change over-length
**     encodings to 0xfffd as some systems recommend.
*/
#define READ_UTF8(zIn, zTerm, c)                           \
  c = *(zIn++);                                            \
  if( c>=0xc0 ){                                           \
    c = cson_utfTrans1[c-0xc0];                          \
    while( zIn!=zTerm && (*zIn & 0xc0)==0x80 ){            \
      c = (c<<6) + (0x3f & *(zIn++));                      \
    }                                                      \
    if( c<0x80                                             \
        || (c&0xFFFFF800)==0xD800                          \
        || (c&0xFFFFFFFE)==0xFFFE ){  c = 0xFFFD; }        \
  }
static int cson_utf8Read(
  const unsigned char *z,         /* First byte of UTF-8 character */
  const unsigned char *zTerm,     /* Pretend this byte is 0x00 */
  const unsigned char **pzNext    /* Write first byte past UTF-8 char here */
){
  int c;
  READ_UTF8(z, zTerm, c);
  *pzNext = z;
  return c;
}
#undef READ_UTF8

#if defined(_WIN32)
#  pragma warning( pop )
#endif

unsigned int cson_string_length_utf8( cson_string const * str )
{
    if( ! str ) return 0;
    else
    {
        char unsigned const * pos = (char unsigned const *)cson_string_cstr(str);
        char unsigned const * end = pos + str->length;
        unsigned int rc = 0;
        for( ; (pos < end) && cson_utf8Read(pos, end, &pos);
            ++rc )
        {
        };
        return rc;
    }
}

/**
   Escapes the first len bytes of the given string as JSON and sends
   it to the given output function (which will be called often - once
   for each logical character). The output is also surrounded by
   double-quotes.

   A NULL str will be escaped as an empty string, though we should
   arguably export it as "null" (without quotes). We do this because
   in JavaScript (typeof null === "object"), and by outputing null
   here we would effectively change the data type from string to
   object.
*/
static int cson_str_to_json( char const * str, unsigned int len,
                             char escapeFwdSlash,
                             cson_data_dest_f f, void * state )
{
    if( NULL == f ) return cson_rc.ArgError;
    else if( !str || !*str || (0 == len) )
    { /* special case for 0-length strings. */
        return f( state, "\"\"", 2 );
    }
    else
    {
        unsigned char const * pos = (unsigned char const *)str;
        unsigned char const * end = (unsigned char const *)(str ? (str + len) : NULL);
        unsigned char const * next = NULL;
        int ch;
        unsigned char clen = 0;
        char escChar[3] = {'\\',0,0};
        enum { UBLen = 8 };
        char ubuf[UBLen];
        int rc = 0;
        rc = f(state, "\"", 1 );
        for( ; (pos < end) && (0 == rc); pos += clen )
        {
            ch = cson_utf8Read(pos, end, &next);
            if( 0 == ch ) break;
            assert( next > pos );
            clen = next - pos;
            assert( clen );
            if( 1 == clen )
            { /* ASCII */
                assert( *pos == ch );
                escChar[1] = 0;
                switch(ch)
                {
                  case '\t': escChar[1] = 't'; break;
                  case '\r': escChar[1] = 'r'; break;
                  case '\n': escChar[1] = 'n'; break;
                  case '\f': escChar[1] = 'f'; break;
                  case '\b': escChar[1] = 'b'; break;
                  case '/':
      /*
        Regarding escaping of forward-slashes. See the main exchange below...

        --------------
        From: Douglas Crockford <douglas@crockford.com>
        To: Stephan Beal <sgbeal@googlemail.com>
        Subject: Re: Is escaping of forward slashes required?

        It is allowed, not required. It is allowed so that JSON can be safely
        embedded in HTML, which can freak out when seeing strings containing
        "</". JSON tolerates "<\/" for this reason.

        On 4/8/2011 2:09 PM, Stephan Beal wrote:
        > Hello, Jsonites,
        >
        > i'm a bit confused on a small grammatic detail of JSON:
        >
        > if i'm reading the grammar chart on http://www.json.org/ correctly,
        > forward slashes (/) are supposed to be escaped in JSON. However, the
        > JSON class provided with my browsers (Chrome and FF, both of which i
        > assume are fairly standards/RFC-compliant) do not escape such characters.
        >
        > Is backslash-escaping forward slashes required? If so, what is the
        > justification for it? (i ask because i find it unnecessary and hard to
        > look at.)
        --------------
      */
                      if( escapeFwdSlash ) escChar[1] = '/';
                      break;
                  case '\\': escChar[1] = '\\'; break;
                  case '"': escChar[1] = '"'; break;
                  default: break;
                }
                if( escChar[1])
                {
                    rc = f(state, escChar, 2);
                }
                else
                {
                    rc = f(state, (char const *)pos, clen);
                }
                continue;
            }
            else
            { /* UTF: transform it to \uXXXX */
                memset(ubuf,0,UBLen);
                rc = sprintf(ubuf, "\\u%04x",ch);
                if( rc != 6 )
                {
                    rc = cson_rc.RangeError;
                    break;
                }
                rc = f( state, ubuf, 6 );
                continue;
            }
        }
        if( 0 == rc )
        {
            rc = f(state, "\"", 1 );
        }
        return rc;
    }
}

int cson_object_iter_init( cson_object const * obj, cson_object_iterator * iter )
{
    if( ! obj || !iter ) return cson_rc.ArgError;
    else
    {
        iter->obj = obj;
        iter->pos = 0;
        return 0;
    }
}

cson_kvp * cson_object_iter_next( cson_object_iterator * iter )
{
    if( ! iter || !iter->obj ) return NULL;
    else if( iter->pos >= iter->obj->kvp.count ) return NULL;
    else
    {
        cson_kvp * rc = iter->obj->kvp.list[iter->pos++];
        while( (NULL==rc) && (iter->pos < iter->obj->kvp.count))
        {
            rc = iter->obj->kvp.list[iter->pos++];
        }
        return rc;
    }
}

static int cson_output_null( cson_data_dest_f f, void * state )
{
    if( !f ) return cson_rc.ArgError;
    else
    {
        return f(state, "null", 4);
    }
}

static int cson_output_bool( cson_value const * src, cson_data_dest_f f, void * state )
{
    if( !f ) return cson_rc.ArgError;
    else
    {
        char const v = cson_value_get_bool(src);
        return f(state, v ? "true" : "false", v ? 4 : 5);
    }
}

static int cson_output_integer( cson_value const * src, cson_data_dest_f f, void * state )
{
    if( !f ) return cson_rc.ArgError;
    else if( !cson_value_is_integer(src) ) return cson_rc.TypeError;
    else
    {
        enum { BufLen = 100 };
        char b[BufLen];
        int rc;
        memset( b, 0, BufLen );
        rc = sprintf( b, "%"CSON_INT_T_PFMT, cson_value_get_integer(src) )
            /* Reminder: snprintf() is C99 */
            ;
        return ( rc<=0 )
            ? cson_rc.RangeError
            : f( state, b, (unsigned int)rc )
            ;
    }
}

static int cson_output_double( cson_value const * src, cson_data_dest_f f, void * state )
{
    if( !f ) return cson_rc.ArgError;
    else if( !cson_value_is_double(src) ) return cson_rc.TypeError;
    else
    {
        enum { BufLen = 128 /* this must be relatively large or huge
                               doubles can cause us to overrun here,
                               resulting in stack-smashing errors.
                            */};
        char b[BufLen];
        int rc;
        memset( b, 0, BufLen );
        rc = sprintf( b, "%"CSON_DOUBLE_T_PFMT, cson_value_get_double(src) )
            /* Reminder: snprintf() is C99 */
            ;
        if( rc<=0 ) return cson_rc.RangeError;
        else if(1)
        { /* Strip trailing zeroes before passing it on... */
            unsigned int urc = (unsigned int)rc;
            char * pos = b + urc - 1;
            for( ; ('0' == *pos) && urc && (*(pos-1) != '.'); --pos, --urc )
            {
                *pos = 0;
            }
            assert(urc && *pos);
            return f( state, b, urc );
        }
        else
        {
            unsigned int urc = (unsigned int)rc;
            return f( state, b, urc );
        }
        return 0;
    }
}

static int cson_output_string( cson_value const * src, char escapeFwdSlash, cson_data_dest_f f, void * state )
{
    if( !f ) return cson_rc.ArgError;
    else if( ! cson_value_is_string(src) ) return cson_rc.TypeError;
    else
    {
        cson_string const * str = cson_value_get_string(src);
        assert( NULL != str );
        return cson_str_to_json(cson_string_cstr(str), str->length, escapeFwdSlash, f, state);
    }
}


/**
   Outputs indention spacing to f().

   blanks: (0)=no indentation, (1)=1 TAB per/level, (>1)=n spaces/level

   depth is the current depth of the output tree, and determines how much
   indentation to generate.

   If blanks is 0 this is a no-op. Returns non-0 on error, and the
   error code will always come from f().
*/
static int cson_output_indent( cson_data_dest_f f, void * state,
                               unsigned char blanks, unsigned int depth )
{
    if( 0 == blanks ) return 0;
    else
    {
#if 0
        /* FIXME: stuff the indention into the buffer and make a single
           call to f().
        */
        enum { BufLen = 200 };
        char buf[BufLen];
#endif
        unsigned int i;
        unsigned int x;
        char const ch = (1==blanks) ? '\t' : ' ';
        int rc = f(state, "\n", 1 );
        for( i = 0; (i < depth) && (0 == rc); ++i )
        {
            for( x = 0; (x < blanks) && (0 == rc); ++x )
            {
                rc = f(state, &ch, 1);
            }
        }
        return rc;
    }
}

static int cson_output_array( cson_value const * src, cson_data_dest_f f, void * state,
                              cson_output_opt const * fmt, unsigned int level );
static int cson_output_object( cson_value const * src, cson_data_dest_f f, void * state,
                               cson_output_opt const * fmt, unsigned int level );
/**
   Main cson_output() implementation. Dispatches to a different impl depending
   on src->api->typeID.

   Returns 0 on success.
*/
static int cson_output_impl( cson_value const * src, cson_data_dest_f f, void * state,
                             cson_output_opt const * fmt, unsigned int level )
{
    if( ! src || !f || !src->api ) return cson_rc.ArgError;
    else
    {
        int rc = 0;
        assert(fmt);
        switch( src->api->typeID )
        {
          case CSON_TYPE_UNDEF:
          case CSON_TYPE_NULL:
              rc = cson_output_null(f, state);
              break;
          case CSON_TYPE_BOOL:
              rc = cson_output_bool(src, f, state);
              break;
          case CSON_TYPE_INTEGER:
              rc = cson_output_integer(src, f, state);
              break;
          case CSON_TYPE_DOUBLE:
              rc = cson_output_double(src, f, state);
              break;
          case CSON_TYPE_STRING:
              rc = cson_output_string(src, fmt->escapeForwardSlashes, f, state);
              break;
          case CSON_TYPE_ARRAY:
              rc = cson_output_array( src, f, state, fmt, level );
              break;
          case CSON_TYPE_OBJECT:
              rc = cson_output_object( src, f, state, fmt, level );
              break;
          default:
              rc = cson_rc.TypeError;
              break;
        }
        return rc;
    }
}


static int cson_output_array( cson_value const * src, cson_data_dest_f f, void * state,
                              cson_output_opt const * fmt, unsigned int level )
{
    if( !src || !f || !fmt ) return cson_rc.ArgError;
    else if( ! cson_value_is_array(src) ) return cson_rc.TypeError;
    else if( level > fmt->maxDepth ) return cson_rc.RangeError;
    else
    {
        int rc;
        unsigned int i;
        cson_value const * v;
        char doIndent = fmt->indentation ? 1 : 0;
        cson_array const * ar = cson_value_get_array(src);
        assert( NULL != ar );
        if( 0 == ar->list.count )
        {
            return f(state, "[]", 2 );
        }
        else if( (1 == ar->list.count) && !fmt->indentSingleMemberValues ) doIndent = 0;
        rc = f(state, "[", 1);
        ++level;
        if( doIndent )
        {
            rc = cson_output_indent( f, state, fmt->indentation, level );
        }
        for( i = 0; (i < ar->list.count) && (0 == rc); ++i )
        {
            v = ar->list.list[i];
            if( v )
            {
                rc = cson_output_impl( v, f, state, fmt, level );
            }
            else
            {
                rc = cson_output_null( f, state );
            }
            if( 0 == rc )
            {
                if(i < (ar->list.count-1))
                {
                    rc = f(state, ",", 1);
                    if( 0 == rc )
                    {
                        rc = doIndent
                            ? cson_output_indent( f, state, fmt->indentation, level )
                            : f( state, " ", 1 );
                    }
                }
            }
        }
        --level;
        if( doIndent && (0 == rc) )
        {
            rc = cson_output_indent( f, state, fmt->indentation, level );
        }
        return (0 == rc)
            ? f(state, "]", 1)
            : rc;
    }
}

static int cson_output_object( cson_value const * src, cson_data_dest_f f, void * state,
                               cson_output_opt const * fmt, unsigned int level )
{
    if( !src || !f || !fmt ) return cson_rc.ArgError;
    else if( ! cson_value_is_object(src) ) return cson_rc.TypeError;
    else if( level > fmt->maxDepth ) return cson_rc.RangeError;
    else
    {
        int rc;
        unsigned int i;
        cson_kvp const * kvp;
        char doIndent = fmt->indentation ? 1 : 0;
        cson_object const * obj = cson_value_get_object(src);
        assert( (NULL != obj) && (NULL != fmt));
        if( 0 == obj->kvp.count )
        {
            return f(state, "{}", 2 );
        }
        else if( (1 == obj->kvp.count) && !fmt->indentSingleMemberValues ) doIndent = 0;
        rc = f(state, "{", 1);
        ++level;
        if( doIndent )
        {
            rc = cson_output_indent( f, state, fmt->indentation, level );
        }
        for( i = 0; (i < obj->kvp.count) && (0 == rc); ++i )
        {
            kvp = obj->kvp.list[i];
            if( kvp && kvp->key )
            {
                cson_string const * sKey = cson_value_get_string(kvp->key);
                char const * cKey = cson_string_cstr(sKey);
                rc = cson_str_to_json(cKey, sKey->length,
                                      fmt->escapeForwardSlashes, f, state);
                if( 0 == rc )
                {
                    rc = fmt->addSpaceAfterColon
                        ? f(state, ": ", 2 )
                        : f(state, ":", 1 )
                        ;
                }
                if( 0 == rc)
                {
                    rc = ( kvp->value )
                        ? cson_output_impl( kvp->value, f, state, fmt, level )
                        : cson_output_null( f, state );
                }
            }
            else
            {
                assert( 0 && "Possible internal error." );
                continue /* internal error? */;
            }
            if( 0 == rc )
            {
                if(i < (obj->kvp.count-1))
                {
                    rc = f(state, ",", 1);
                    if( 0 == rc )
                    {
                        rc = doIndent
                            ? cson_output_indent( f, state, fmt->indentation, level )
                            : f( state, " ", 1 );
                    }
                }
            }
        }
        --level;
        if( doIndent && (0 == rc) )
        {
            rc = cson_output_indent( f, state, fmt->indentation, level );
        }
        return (0 == rc)
            ? f(state, "}", 1)
            : rc;
    }
}

int cson_output( cson_value const * src, cson_data_dest_f f,
                 void * state, cson_output_opt const * fmt )
{
    int rc;
    if(! fmt ) fmt = &cson_output_opt_empty;
    rc = cson_output_impl(src, f, state, fmt, 0 );
    if( (0 == rc) && fmt->addNewline )
    {
        rc = f(state, "\n", 1);
    }
    return rc;
}

int cson_data_dest_FILE( void * state, void const * src, unsigned int n )
{
    if( ! state ) return cson_rc.ArgError;
    else if( !src || !n ) return 0;
    else
    {
        return ( 1 == fwrite( src, n, 1, (FILE*) state ) )
            ? 0
            : cson_rc.IOError;
    }
}

int cson_output_FILE( cson_value const * src, FILE * dest, cson_output_opt const * fmt )
{
    int rc = 0;
    if( fmt )
    {
        rc = cson_output( src, cson_data_dest_FILE, dest, fmt );
    }
    else
    {
        /* We normally want a newline on FILE output. */
        cson_output_opt opt = cson_output_opt_empty;
        opt.addNewline = 1;
        rc = cson_output( src, cson_data_dest_FILE, dest, &opt );
    }
    if( 0 == rc )
    {
        fflush( dest );
    }
    return rc;
}

int cson_output_filename( cson_value const * src, char const * dest, cson_output_opt const * fmt )
{
    if( !src || !dest ) return cson_rc.ArgError;
    else
    {
        FILE * f = fopen(dest,"wb");
        if( !f ) return cson_rc.IOError;
        else
        {
            int const rc = cson_output_FILE( src, f, fmt );
            fclose(f);
            return rc;
        }
    }
}

int cson_parse_filename( cson_value ** tgt, char const * src,
                         cson_parse_opt const * opt, cson_parse_info * err )
{
    if( !src || !tgt ) return cson_rc.ArgError;
    else
    {
        FILE * f = fopen(src, "r");
        if( !f ) return cson_rc.IOError;
        else
        {
            int const rc = cson_parse_FILE( tgt, f, opt, err );
            fclose(f);
            return rc;
        }
    }
}

/** Internal type to hold state for a JSON input string.
 */
typedef struct cson_data_source_StringSource_
{
    /** Start of input string. */
    char const * str;
    /** Current iteration position. Must initially be == str. */
    char const * pos;
    /** Logical EOF, one-past-the-end of str. */
    char const * end;
}  cson_data_source_StringSource_t;

/**
   A cson_data_source_f() implementation which requires the state argument
   to be a properly populated (cson_data_source_StringSource_t*).
*/
static int cson_data_source_StringSource( void * state, void * dest, unsigned int * n )
{
    if( !state || !n || !dest ) return cson_rc.ArgError;
    else if( !*n ) return 0 /* ignore this */;
    else
    {
        unsigned int i;
        cson_data_source_StringSource_t * ss = (cson_data_source_StringSource_t*) state;
        unsigned char * tgt = (unsigned char *)dest;
        for( i = 0; (i < *n) && (ss->pos < ss->end); ++i, ++ss->pos, ++tgt )
        {
            *tgt = *ss->pos;
        }
        *n = i;
        return 0;
    }
}

int cson_parse_string( cson_value ** tgt, char const * src, unsigned int len,
                       cson_parse_opt const * opt, cson_parse_info * err )
{
    if( ! tgt || !src ) return cson_rc.ArgError;
    else if( !*src || (len<2/*2==len of {} and []*/) ) return cson_rc.RangeError;
    else
    {
        cson_data_source_StringSource_t ss;
        ss.str = ss.pos = src;
        ss.end = src + len;
        return cson_parse( tgt, cson_data_source_StringSource, &ss, opt, err );
    }

}

int cson_parse_buffer( cson_value ** tgt,
                       cson_buffer const * buf,
                       cson_parse_opt const * opt,
                       cson_parse_info * err )
{
    return ( !tgt || !buf || !buf->mem || !buf->used )
        ? cson_rc.ArgError
        : cson_parse_string( tgt, (char const *)buf->mem,
                             buf->used, opt, err );
}

int cson_buffer_reserve( cson_buffer * buf, cson_size_t n )
{
    if( ! buf ) return cson_rc.ArgError;
    else if( 0 == n )
    {
        cson_free(buf->mem, "cson_buffer::mem");
        *buf = cson_buffer_empty;
        return 0;
    }
    else if( buf->capacity >= n )
    {
        return 0;
    }
    else
    {
        unsigned char * x = (unsigned char *)realloc( buf->mem, n );
        if( ! x ) return cson_rc.AllocError;
        memset( x + buf->used, 0, n - buf->used );
        buf->mem = x;
        buf->capacity = n;
        ++buf->timesExpanded;
        return 0;
    }
}

cson_size_t cson_buffer_fill( cson_buffer * buf, char c )
{
    if( !buf || !buf->capacity || !buf->mem ) return 0;
    else
    {
        memset( buf->mem, c, buf->capacity );
        return buf->capacity;
    }
}

/**
   cson_data_dest_f() implementation, used by cson_output_buffer().

   arg MUST be a (cson_buffer*). This function appends n bytes at
   position arg->used, expanding the buffer as necessary.
*/
static int cson_data_dest_cson_buffer( void * arg, void const * data_, unsigned int n )
{
    if( ! arg || (n<0) ) return cson_rc.ArgError;
    else if( ! n ) return 0;
    else
    {
        cson_buffer * sb = (cson_buffer*)arg;
        char const * data = (char const *)data_;
        cson_size_t npos = sb->used + n;
        unsigned int i;
        if( npos >= sb->capacity )
        {
            const cson_size_t oldCap = sb->capacity;
            const cson_size_t asz = npos * 2;
            if( asz < npos ) return cson_rc.ArgError; /* overflow */
            else if( 0 != cson_buffer_reserve( sb, asz ) ) return cson_rc.AllocError;
            assert( (sb->capacity > oldCap) && "Internal error in memory buffer management!" );
            /* make sure it gets NULL terminated. */
            memset( sb->mem + oldCap, 0, (sb->capacity - oldCap) );
        }
        for( i = 0; i < n; ++i, ++sb->used )
        {
            sb->mem[sb->used] = data[i];
        }
        return 0;
    }
}


int cson_output_buffer( cson_value const * v, cson_buffer * buf,
                        cson_output_opt const * opt )
{
    int rc = cson_output( v, cson_data_dest_cson_buffer, buf, opt );
    if( 0 == rc )
    { /* Ensure that the buffer is null-terminated. */
        rc = cson_buffer_reserve( buf, buf->used + 1 );
        if( 0 == rc )
        {
            buf->mem[buf->used] = 0;
        }
    }
    return rc;
}

/** @internal

Tokenizes an input string on a given separator. Inputs are:

- (inp) = is a pointer to the pointer to the start of the input.

- (separator) = the separator character

- (end) = a pointer to NULL. i.e. (*end == NULL)

This function scans *inp for the given separator char or a NULL char.
Successive separators at the start of *inp are skipped. The effect is
that, when this function is called in a loop, all neighboring
separators are ignored. e.g. the string "aa.bb...cc" will tokenize to
the list (aa,bb,cc) if the separator is '.' and to (aa.,...cc) if the
separator is 'b'.

Returns 0 (false) if it finds no token, else non-0 (true).

Output:

- (*inp) will be set to the first character of the next token.

- (*end) will point to the one-past-the-end point of the token.

If (*inp == *end) then the end of the string has been reached
without finding a token.

Post-conditions:

- (*end == *inp) if no token is found.

- (*end > *inp) if a token is found.

It is intolerant of NULL values for (inp, end), and will assert() in
debug builds if passed NULL as either parameter.
*/
static char cson_next_token( char const ** inp, char separator, char const ** end )
{
    char const * pos = NULL;
    assert( inp && end && *inp );
    if( *inp == *end ) return 0;
    pos = *inp;
    if( !*pos )
    {
        *end = pos;
        return 0;
    }
    for( ; *pos && (*pos == separator); ++pos) { /* skip preceeding splitters */ }
    *inp = pos;
    for( ; *pos && (*pos != separator); ++pos) { /* find next splitter */ }
    *end = pos;
    return (pos > *inp) ? 1 : 0;
}

int cson_object_fetch_sub2( cson_object const * obj, cson_value ** tgt, char const * path )
{
    if( ! obj || !path ) return cson_rc.ArgError;
    else if( !*path || !*(1+path) ) return cson_rc.RangeError;
    else return cson_object_fetch_sub(obj, tgt, path+1, *path);
}

int cson_object_fetch_sub( cson_object const * obj, cson_value ** tgt, char const * path, char sep )
{
    if( ! obj || !path ) return cson_rc.ArgError;
    else if( !*path || !sep ) return cson_rc.RangeError;
    else
    {
        char const * beg = path;
        char const * end = NULL;
        int rc;
        unsigned int i, len;
        unsigned int tokenCount = 0;
        cson_value * cv = NULL;
        cson_object const * curObj = obj;
        enum { BufSize = 128 };
        char buf[BufSize];
        memset( buf, 0, BufSize );
        rc = cson_rc.RangeError;

        while( cson_next_token( &beg, sep, &end ) )
        {
            if( beg == end ) break;
            else
            {
                ++tokenCount;
                beg = end;
                end = NULL;
            }
        }
        if( 0 == tokenCount ) return cson_rc.RangeError;
        beg = path;
        end = NULL;
        for( i = 0; i < tokenCount; ++i, beg=end, end=NULL )
        {
            rc = cson_next_token( &beg, sep, &end );
            assert( 1 == rc );
            assert( beg != end );
            assert( end > beg );
            len = end - beg;
            if( len > (BufSize-1) ) return cson_rc.RangeError;
            memset( buf, 0, len + 1 );
            memcpy( buf, beg, len );
            buf[len] = 0;
            cv = cson_object_get( curObj, buf );
            if( NULL == cv ) return cson_rc.NotFoundError;
            else if( i == (tokenCount-1) )
            {
                if(tgt) *tgt = cv;
                return 0;
            }
            else if( cson_value_is_object(cv) )
            {
                curObj = cson_value_get_object(cv);
                assert((NULL != curObj) && "Detected mis-management of internal memory!");
            }
            /* TODO: arrays. Requires numeric parsing for the index. */
            else
            {
                return cson_rc.NotFoundError;
            }
        }
        assert( i == tokenCount );
        return cson_rc.NotFoundError;
    }
}

cson_value * cson_object_get_sub( cson_object const * obj, char const * path, char sep )
{
    cson_value * v = NULL;
    cson_object_fetch_sub( obj, &v, path, sep );
    return v;
}

cson_value * cson_object_get_sub2( cson_object const * obj, char const * path )
{
    cson_value * v = NULL;
    cson_object_fetch_sub2( obj, &v, path );
    return v;
}

static cson_value * cson_value_clone_array( cson_value const * orig )
{
    unsigned int i = 0;
    cson_array const * asrc = cson_value_get_array( orig );
    unsigned int alen = cson_array_length_get( asrc );
    cson_value * destV = NULL;
    cson_array * destA = NULL;
    assert( orig && asrc );
    destV = cson_value_new_array();
    if( NULL == destV ) return NULL;
    destA = cson_value_get_array( destV );
    assert( destA );
    if( 0 != cson_array_reserve( destA, alen ) )
    {
        cson_value_free( destV );
        return NULL;
    }
    for( ; i < alen; ++i )
    {
        cson_value * ch = cson_array_get( asrc, i );
        if( NULL != ch )
        {
            cson_value * cl = cson_value_clone( ch );
            if( NULL == cl )
            {
                cson_value_free( destV );
                return NULL;
            }
            if( 0 != cson_array_set( destA, i, cl ) )
            {
                cson_value_free( cl );
                cson_value_free( destV );
                return NULL;
            }
        }
    }
    return destV;
}

static cson_value * cson_value_clone_object( cson_value const * orig )
{
    cson_object const * src = cson_value_get_object( orig );
    cson_value * destV = NULL;
    cson_object * dest = NULL;
    cson_kvp const * kvp = NULL;
    cson_object_iterator iter = cson_object_iterator_empty;
    assert( orig && src );
    if( 0 != cson_object_iter_init( src, &iter ) )
    {
        return NULL;
    }
    destV = cson_value_new_object();
    if( NULL == destV ) return NULL;
    dest = cson_value_get_object( destV );
    assert( dest );
    if( src->kvp.count > cson_kvp_list_reserve( &dest->kvp, src->kvp.count ) ){
        cson_value_free( destV );
        return NULL;
    }
    while( (kvp = cson_object_iter_next( &iter )) )
    {
        /*
          FIXME: refcount the keys! We first need a setter which takes
          a cson_string or cson_value key type.
         */
        cson_value * key = NULL;
        cson_value * val = NULL;
        key = cson_value_clone(kvp->key);
        val = key ? cson_value_clone( kvp->value ) : NULL;
        if( ! key || !val ){
            cson_value_free(key);
            cson_value_free(val);
            cson_value_free(destV);
            return NULL;
        }
        assert( CSON_STR(key) );
        if( 0 != cson_object_set_s( dest, CSON_STR(key), val ) )
        {
            cson_value_free(key);
            cson_value_free(val);
            cson_value_free(destV);
            return NULL;
        }
    }
    return destV;
}

cson_value * cson_value_clone( cson_value const * orig )
{
    if( NULL == orig ) return NULL;
    else
    {
        switch( orig->api->typeID )
        {
          case CSON_TYPE_UNDEF:
              assert(0 && "This should never happen.");
              return NULL;
          case CSON_TYPE_NULL:
              return cson_value_null();
          case CSON_TYPE_BOOL:
              return cson_value_new_bool( cson_value_get_bool( orig ) );
          case CSON_TYPE_INTEGER:
              return cson_value_new_integer( cson_value_get_integer( orig ) );
              break;
          case CSON_TYPE_DOUBLE:
              return cson_value_new_double( cson_value_get_double( orig ) );
              break;
          case CSON_TYPE_STRING: {
              cson_string const * str = cson_value_get_string( orig );
              return cson_value_new_string( cson_string_cstr( str ),
                                            cson_string_length_bytes( str ) );
          }
          case CSON_TYPE_ARRAY:
              return cson_value_clone_array( orig );
          case CSON_TYPE_OBJECT:
              return cson_value_clone_object( orig );
        }
        assert( 0 && "We can't get this far." );
        return NULL;
    }
}

cson_value * cson_string_value(cson_string const * s)
{
#define MT CSON_SPECIAL_VALUES[CSON_VAL_STR_EMPTY]
    return s
        ? ((s==MT.value) ? &MT : CSON_VCAST(s))
        : NULL;
#undef MT
}

cson_value * cson_object_value(cson_object const * s)
{
    return s
        ? CSON_VCAST(s)
        : NULL;
}


cson_value * cson_array_value(cson_array const * s)
{
    return s
        ? CSON_VCAST(s)
        : NULL;
}

void cson_free_object(cson_object *x)
{
    if(x) cson_value_free(cson_object_value(x));
}
void cson_free_array(cson_array *x)
{
    if(x) cson_value_free(cson_array_value(x));
}

void cson_free_string(cson_string const *x)
{
    if(x) cson_value_free(cson_string_value(x));
}
void cson_free_value(cson_value *x)
{
    cson_value_free(x);
}


#if 0
/* i'm not happy with this... */
char * cson_pod_to_string( cson_value const * orig )
{
    if( ! orig ) return NULL;
    else
    {
        enum { BufSize = 64 };
        char * v = NULL;
        switch( orig->api->typeID )
        {
          case CSON_TYPE_BOOL: {
              char const bv = cson_value_get_bool(orig);
              v = cson_strdup( bv ? "true" : "false",
                               bv ? 4 : 5 );
              break;
          }
          case CSON_TYPE_UNDEF:
          case CSON_TYPE_NULL: {
              v = cson_strdup( "null", 4 );
              break;
          }
          case CSON_TYPE_STRING: {
              cson_string const * jstr = cson_value_get_string(orig);
              unsigned const int slen = cson_string_length_bytes( jstr );
              assert( NULL != jstr );
              v = cson_strdup( cson_string_cstr( jstr ), slen ); 
              break;
          }
          case CSON_TYPE_INTEGER: {
              char buf[BufSize] = {0};
              if( 0 < sprintf( v, "%"CSON_INT_T_PFMT, cson_value_get_integer(orig)) )
              {
                  v = cson_strdup( buf, strlen(buf) );
              }
              break;
          }
          case CSON_TYPE_DOUBLE: {
              char buf[BufSize] = {0};
              if( 0 < sprintf( v, "%"CSON_DOUBLE_T_PFMT, cson_value_get_double(orig)) )
              {
                  v = cson_strdup( buf, strlen(buf) );
              }
              break;
          }
          default:
              break;
        }
        return v;
    }
}
#endif

#if 0
/* i'm not happy with this... */
char * cson_pod_to_string( cson_value const * orig )
{
    if( ! orig ) return NULL;
    else
    {
        enum { BufSize = 64 };
        char * v = NULL;
        switch( orig->api->typeID )
        {
          case CSON_TYPE_BOOL: {
              char const bv = cson_value_get_bool(orig);
              v = cson_strdup( bv ? "true" : "false",
                               bv ? 4 : 5 );
              break;
          }
          case CSON_TYPE_UNDEF:
          case CSON_TYPE_NULL: {
              v = cson_strdup( "null", 4 );
              break;
          }
          case CSON_TYPE_STRING: {
              cson_string const * jstr = cson_value_get_string(orig);
              unsigned const int slen = cson_string_length_bytes( jstr );
              assert( NULL != jstr );
              v = cson_strdup( cson_string_cstr( jstr ), slen ); 
              break;
          }
          case CSON_TYPE_INTEGER: {
              char buf[BufSize] = {0};
              if( 0 < sprintf( v, "%"CSON_INT_T_PFMT, cson_value_get_integer(orig)) )
              {
                  v = cson_strdup( buf, strlen(buf) );
              }
              break;
          }
          case CSON_TYPE_DOUBLE: {
              char buf[BufSize] = {0};
              if( 0 < sprintf( v, "%"CSON_DOUBLE_T_PFMT, cson_value_get_double(orig)) )
              {
                  v = cson_strdup( buf, strlen(buf) );
              }
              break;
          }
          default:
              break;
        }
        return v;
    }
}
#endif

unsigned int cson_value_msize(cson_value const * v)
{
    if(!v) return 0;
    else if( cson_value_is_builtin(v) ) return 0;
    else {
        unsigned int rc = sizeof(cson_value);
        assert(NULL != v->api);
        switch(v->api->typeID){
          case CSON_TYPE_INTEGER:
              assert( v != &CSON_SPECIAL_VALUES[CSON_VAL_INT_0]);
              rc += sizeof(cson_int_t);
              break;
          case CSON_TYPE_DOUBLE:
              assert( v != &CSON_SPECIAL_VALUES[CSON_VAL_DBL_0]);
              rc += sizeof(cson_double_t);
              break;
          case CSON_TYPE_STRING:
              rc += sizeof(cson_string)
                  + CSON_STR(v)->length + 1/*NUL*/;
              break;
          case CSON_TYPE_ARRAY:{
              cson_array const * ar = CSON_ARRAY(v);
              cson_value_list const * li;
              unsigned int i = 0;
              assert( NULL != ar );
              li = &ar->list;
              rc += sizeof(cson_array)
                  + (li->alloced * sizeof(cson_value *));
              for( ; i < li->count; ++i ){
                  cson_value const * e = ar->list.list[i];
                  if( e ) rc += cson_value_msize( e );
              }
              break;
          }
          case CSON_TYPE_OBJECT:{
              cson_object const * obj = CSON_OBJ(v);
              unsigned int i = 0;
              cson_kvp_list const * kl;
              assert(NULL != obj);
              kl = &obj->kvp;
              rc += sizeof(cson_object)
                  + (kl->alloced * sizeof(cson_kvp*));
              for( ; i < kl->count; ++i ){
                  cson_kvp const * kvp = kl->list[i];
                  assert(NULL != kvp);
                  rc += cson_value_msize(kvp->key);
                  rc += cson_value_msize(kvp->value);
              }
              break;
          }
          case CSON_TYPE_UNDEF:
          case CSON_TYPE_NULL:
          case CSON_TYPE_BOOL:
              assert( 0 && "Should have been caught by is-builtin check!" );
              break;
          default:
              assert(0 && "Invalid typeID!");
              return 0;

        }
        return rc;
    }
}

int cson_object_merge( cson_object * dest, cson_object const * src, int flags ){
    cson_object_iterator iter = cson_object_iterator_empty;
    int rc;
    char const replace = (flags & CSON_MERGE_REPLACE);
    char const recurse = !(flags & CSON_MERGE_NO_RECURSE);
    cson_kvp const * kvp;
    if((!dest || !src) || (dest==src)) return cson_rc.ArgError;
    rc = cson_object_iter_init( src, &iter );
    if(rc) return rc;
    while( (kvp = cson_object_iter_next(&iter) ) )
    {
        cson_string * key = cson_kvp_key(kvp);
        cson_value * val = cson_kvp_value(kvp);
        cson_value * check = cson_object_get_s( dest, key );
        if(!check){
            cson_object_set_s( dest, key, val );
            continue;
        }
        else if(!replace && !recurse) continue;
        else if(replace && !recurse){
            cson_object_set_s( dest, key, val );
            continue;
        }
        else if( recurse ){
            if( cson_value_is_object(check) &&
                cson_value_is_object(val) ){
                rc = cson_object_merge( cson_value_get_object(check),
                                        cson_value_get_object(val),
                                        flags );
                if(rc) return rc;
                else continue;
            }
            else continue;
        }
        else continue;
    }
    return 0;
}

#if defined(__cplusplus)
} /*extern "C"*/
#endif

#undef MARKER
#undef CSON_OBJECT_PROPS_SORT
#undef CSON_OBJECT_PROPS_SORT_USE_LENGTH
#undef CSON_CAST
#undef CSON_INT
#undef CSON_DBL
#undef CSON_STR
#undef CSON_OBJ
#undef CSON_ARRAY
#undef CSON_VCAST
#undef CSON_MALLOC_IMPL
#undef CSON_FREE_IMPL
#undef CSON_REALLOC_IMPL
/* end file ./cson.c */
/* begin file ./cson_lists.h */
/* Auto-generated from cson_list.h. Edit at your own risk! */
unsigned int cson_value_list_reserve( cson_value_list * self, unsigned int n )
{
    if( !self ) return 0;
    else if(0 == n)
    {
        if(0 == self->alloced) return 0;
        cson_free(self->list, "cson_value_list_reserve");
        self->list = NULL;
        self->alloced = self->count = 0;
        return 0;
    }
    else if( self->alloced >= n )
    {
        return self->alloced;
    }
    else
    {
        size_t const sz = sizeof(cson_value *) * n;
        cson_value * * m = (cson_value **)cson_realloc( self->list, sz, "cson_value_list_reserve" );
        if( ! m ) return self->alloced;

        memset( m + self->alloced, 0, (sizeof(cson_value *)*(n-self->alloced)));
        self->alloced = n;
        self->list = m;
        return n;
    }
}
int cson_value_list_append( cson_value_list * self, cson_value * cp )
{
    if( !self || !cp ) return cson_rc.ArgError;
    else if( self->alloced > cson_value_list_reserve(self, self->count+1) )
    {
        return cson_rc.AllocError;
    }
    else
    {
        self->list[self->count++] = cp;
        return 0;
    }
}
int cson_value_list_visit( cson_value_list * self,

                        int (*visitor)(cson_value * obj, void * visitorState ),



                        void * visitorState )
{
    int rc = cson_rc.ArgError;
    if( self && visitor )
    {
        unsigned int i = 0;
        for( rc = 0; (i < self->count) && (0 == rc); ++i )
        {

            cson_value * obj = self->list[i];



            if(obj) rc = visitor( obj, visitorState );
        }
    }
    return rc;
}
void cson_value_list_clean( cson_value_list * self,

                         void (*cleaner)(cson_value * obj)



                         )
{
    if( self && cleaner && self->count )
    {
        unsigned int i = 0;
        for( ; i < self->count; ++i )
        {

            cson_value * obj = self->list[i];



            if(obj) cleaner(obj);
        }
    }
    cson_value_list_reserve(self,0);
}
unsigned int cson_kvp_list_reserve( cson_kvp_list * self, unsigned int n )
{
    if( !self ) return 0;
    else if(0 == n)
    {
        if(0 == self->alloced) return 0;
        cson_free(self->list, "cson_kvp_list_reserve");
        self->list = NULL;
        self->alloced = self->count = 0;
        return 0;
    }
    else if( self->alloced >= n )
    {
        return self->alloced;
    }
    else
    {
        size_t const sz = sizeof(cson_kvp *) * n;
        cson_kvp * * m = (cson_kvp **)cson_realloc( self->list, sz, "cson_kvp_list_reserve" );
        if( ! m ) return self->alloced;

        memset( m + self->alloced, 0, (sizeof(cson_kvp *)*(n-self->alloced)));
        self->alloced = n;
        self->list = m;
        return n;
    }
}
int cson_kvp_list_append( cson_kvp_list * self, cson_kvp * cp )
{
    if( !self || !cp ) return cson_rc.ArgError;
    else if( self->alloced > cson_kvp_list_reserve(self, self->count+1) )
    {
        return cson_rc.AllocError;
    }
    else
    {
        self->list[self->count++] = cp;
        return 0;
    }
}
int cson_kvp_list_visit( cson_kvp_list * self,

                        int (*visitor)(cson_kvp * obj, void * visitorState ),



                        void * visitorState )
{
    int rc = cson_rc.ArgError;
    if( self && visitor )
    {
        unsigned int i = 0;
        for( rc = 0; (i < self->count) && (0 == rc); ++i )
        {

            cson_kvp * obj = self->list[i];



            if(obj) rc = visitor( obj, visitorState );
        }
    }
    return rc;
}
void cson_kvp_list_clean( cson_kvp_list * self,

                         void (*cleaner)(cson_kvp * obj)



                         )
{
    if( self && cleaner && self->count )
    {
        unsigned int i = 0;
        for( ; i < self->count; ++i )
        {

            cson_kvp * obj = self->list[i];



            if(obj) cleaner(obj);
        }
    }
    cson_kvp_list_reserve(self,0);
}
/* end file ./cson_lists.h */
/* begin file ./cson_sqlite3.c */
/** @file cson_sqlite3.c

This file contains the implementation code for the cson
sqlite3-to-JSON API.

License: the same as the cson core library.

Author: Stephan Beal (http://wanderinghorse.net/home/stephan)
*/
#if CSON_ENABLE_SQLITE3 /* we do this here for the sake of the amalgamation build */
#include <assert.h>
#include <string.h> /* strlen() */

#if 0
#include <stdio.h>
#define MARKER if(1) printf("MARKER: %s:%d:%s():\t",__FILE__,__LINE__,__func__); if(1) printf
#else
#define MARKER if(0) printf
#endif

#if defined(__cplusplus)
extern "C" {
#endif

cson_value * cson_sqlite3_column_to_value( sqlite3_stmt * st, int col )
{
    if( ! st ) return NULL;
    else
    {
#if 0
        sqlite3_value * val = sqlite3_column_type(st,col);
        int const vtype = val ? sqlite3_value_type(val) : -1;
        if( ! val ) return cson_value_null();
#else
        int const vtype = sqlite3_column_type(st,col);
#endif
        switch( vtype )
        {
          case SQLITE_NULL:
              return cson_value_null();
          case SQLITE_INTEGER:
              /* FIXME: for large integers fall back to Double instead. */
              return cson_value_new_integer( (cson_int_t) sqlite3_column_int64(st, col)  );
          case SQLITE_FLOAT:
              return cson_value_new_double( sqlite3_column_double(st, col) );
          case SQLITE_BLOB: /* arguably fall through... */
          case SQLITE_TEXT: {
              char const * str = (char const *)sqlite3_column_text(st,col);
              return cson_value_new_string(str, str ? strlen(str) : 0);
          }
          default:
              return NULL;
        }
    }
}

cson_value * cson_sqlite3_column_names( sqlite3_stmt * st )
{
    cson_value * aryV = NULL;
    cson_array * ary = NULL;
    char const * colName = NULL;
    int i = 0;
    int rc = 0;
    int colCount = 0;
    assert(st);
    colCount = sqlite3_column_count(st);
    if( colCount <= 0 ) return NULL;
    
    aryV = cson_value_new_array();
    if( ! aryV ) return NULL;
    ary = cson_value_get_array(aryV);
    assert(ary);
    for( i = 0; (0 ==rc) && (i < colCount); ++i )
    {
        colName = sqlite3_column_name( st, i );
        if( ! colName ) rc = cson_rc.AllocError;
        else
        {
            rc = cson_array_set( ary, (unsigned int)i,
                    cson_value_new_string(colName, strlen(colName)) );
        }
    }
    if( 0 == rc ) return aryV;
    else
    {
        cson_value_free(aryV);
        return NULL;
    }
}


cson_value * cson_sqlite3_row_to_object2( sqlite3_stmt * st,
                                          cson_array * colNames )
{
    cson_value * rootV = NULL;
    cson_object * root = NULL;
    cson_string * colName = NULL;
    int i = 0;
    int rc = 0;
    cson_value * currentValue = NULL;
    int const colCount = sqlite3_column_count(st);
    if( !colCount || (colCount>cson_array_length_get(colNames)) ) {
        return NULL;
    }
    rootV = cson_value_new_object();
    if(!rootV) return NULL;
    root = cson_value_get_object(rootV);
    for( i = 0; i < colCount; ++i )
    {
        colName = cson_value_get_string( cson_array_get( colNames, i ) );
        if( ! colName ) goto error;
        currentValue = cson_sqlite3_column_to_value(st,i);
        if( ! currentValue ) currentValue = cson_value_null();
        rc = cson_object_set_s( root, colName, currentValue );
        if( 0 != rc )
        {
            cson_value_free( currentValue );
            goto error;
        }
    }
    goto end;
    error:
    cson_value_free( rootV );
    rootV = NULL;
    end:
    return rootV;
}


cson_value * cson_sqlite3_row_to_object( sqlite3_stmt * st )
{
#if 0
    cson_value * arV = cson_sqlite3_column_names(st);
    cson_array * ar = NULL;
    cson_value * rc = NULL;
    if(!arV) return NULL;
    ar = cson_value_get_array(arV);
    assert( NULL != ar );
    rc = cson_sqlite3_row_to_object2(st, ar);
    cson_value_free(arV);
    return rc;
#else
    cson_value * rootV = NULL;
    cson_object * root = NULL;
    char const * colName = NULL;
    int i = 0;
    int rc = 0;
    cson_value * currentValue = NULL;
    int const colCount = sqlite3_column_count(st);
    if( !colCount ) return NULL;
    rootV = cson_value_new_object();
    if(!rootV) return NULL;
    root = cson_value_get_object(rootV);
    for( i = 0; i < colCount; ++i )
    {
        colName = sqlite3_column_name( st, i );
        if( ! colName ) goto error;
        currentValue = cson_sqlite3_column_to_value(st,i);
        if( ! currentValue ) currentValue = cson_value_null();
        rc = cson_object_set( root, colName, currentValue );
        if( 0 != rc )
        {
            cson_value_free( currentValue );
            goto error;
        }
    }
    goto end;
    error:
    cson_value_free( rootV );
    rootV = NULL;
    end:
    return rootV;
#endif
}

cson_value * cson_sqlite3_row_to_array( sqlite3_stmt * st )
{
    cson_value * aryV = NULL;
    cson_array * ary = NULL;
    int i = 0;
    int rc = 0;
    int const colCount = sqlite3_column_count(st);
    if( ! colCount ) return NULL;
    aryV = cson_value_new_array();
    if( ! aryV ) return NULL;
    ary = cson_value_get_array(aryV);
    rc = cson_array_reserve(ary, (unsigned int) colCount );
    if( 0 != rc ) goto error;

    for( i = 0; i < colCount; ++i ){
        cson_value * elem = cson_sqlite3_column_to_value(st,i);
        if( ! elem ) goto error;
        rc = cson_array_append(ary,elem);
        if(0!=rc)
        {
            cson_value_free( elem );
            goto end;
        }
    }
    goto end;
    error:
    cson_value_free(aryV);
    aryV = NULL;
    end:
    return aryV;
}

    
/**
    Internal impl of cson_sqlite3_stmt_to_json() when the 'fat'
    parameter is non-0.
*/
static int cson_sqlite3_stmt_to_json_fat( sqlite3_stmt * st, cson_value ** tgt )
{
#define RETURN(RC) { if(rootV) cson_value_free(rootV); return RC; }
    if( ! tgt || !st ) return cson_rc.ArgError;
    else
    {
        cson_value * rootV = NULL;
        cson_object * root = NULL;
        cson_value * colsV = NULL;
        cson_array * cols = NULL;
        cson_value * rowsV = NULL;
        cson_array * rows = NULL;
        cson_value * objV = NULL;
        int rc = 0;
        int const colCount = sqlite3_column_count(st);
        if( colCount <= 0 ) return cson_rc.ArgError;
        rootV = cson_value_new_object();
        if( ! rootV ) return cson_rc.AllocError;
        colsV = cson_sqlite3_column_names(st);
        if( ! colsV )
        {
            cson_value_free( rootV );
            RETURN(cson_rc.AllocError);
        }
        cols = cson_value_get_array(colsV);
        assert(NULL != cols);
        root = cson_value_get_object(rootV);
        rc = cson_object_set( root, "columns", colsV );
        if( rc )
        {
            cson_value_free( colsV );
            RETURN(rc);
        }
        rowsV = cson_value_new_array();
        if( ! rowsV ) RETURN(cson_rc.AllocError);
        rc = cson_object_set( root, "rows", rowsV );
        if( rc )
        {
            cson_value_free( rowsV );
            RETURN(rc);
        }
        rows = cson_value_get_array(rowsV);
        assert(rows);
        while( SQLITE_ROW == sqlite3_step(st) )
        {
            objV = cson_sqlite3_row_to_object2(st, cols);
            if( ! objV ) RETURN(cson_rc.UnknownError);
            rc = cson_array_append( rows, objV );
            if( rc )
            {
                cson_value_free( objV );
                RETURN(rc);
            }
        }
        *tgt = rootV;
        return 0;
    }
#undef RETURN
}

/**
    Internal impl of cson_sqlite3_stmt_to_json() when the 'fat'
    parameter is 0.
*/
static int cson_sqlite3_stmt_to_json_slim( sqlite3_stmt * st, cson_value ** tgt )
{
#define RETURN(RC) { if(rootV) cson_value_free(rootV); return RC; }
    if( ! tgt || !st ) return cson_rc.ArgError;
    else
    {
        cson_value * rootV = NULL;
        cson_object * root = NULL;
        cson_value * aryV = NULL;
        cson_array * ary = NULL;
        cson_value * rowsV = NULL;
        cson_array * rows = NULL;
        int rc = 0;
        int const colCount = sqlite3_column_count(st);
        if( colCount <= 0 ) return cson_rc.ArgError;
        rootV = cson_value_new_object();
        if( ! rootV ) return cson_rc.AllocError;
        aryV = cson_sqlite3_column_names(st);
        if( ! aryV )
        {
            cson_value_free( rootV );
            RETURN(cson_rc.AllocError);
        }
        root = cson_value_get_object(rootV);
        rc = cson_object_set( root, "columns", aryV );
        if( rc )
        {
            cson_value_free( aryV );
            RETURN(rc);
        }
        aryV = NULL;
        ary = NULL;
        rowsV = cson_value_new_array();
        if( ! rowsV ) RETURN(cson_rc.AllocError);
        rc = cson_object_set( root, "rows", rowsV );
        if( 0 != rc )
        {
            cson_value_free( rowsV );
            RETURN(rc);
        }
        rows = cson_value_get_array(rowsV);
        assert(rows);
        while( SQLITE_ROW == sqlite3_step(st) )
        {
            aryV = cson_sqlite3_row_to_array(st);
            if( ! aryV ) RETURN(cson_rc.UnknownError);
            rc = cson_array_append( rows, aryV );
            if( 0 != rc )
            {
                cson_value_free( aryV );
                RETURN(rc);
            }
        }
        *tgt = rootV;
        return 0;
    }
#undef RETURN
}

int cson_sqlite3_stmt_to_json( sqlite3_stmt * st, cson_value ** tgt, char fat )
{
    return fat
        ? cson_sqlite3_stmt_to_json_fat(st,tgt)
        : cson_sqlite3_stmt_to_json_slim(st,tgt)
        ;
}

int cson_sqlite3_sql_to_json( sqlite3 * db, cson_value ** tgt, char const * sql, char fat )
{
    if( !db || !tgt || !sql || !*sql ) return cson_rc.ArgError;
    else
    {
        sqlite3_stmt * st = NULL;
        int rc = sqlite3_prepare_v2( db, sql, -1, &st, NULL );
        if( 0 != rc ) return cson_rc.IOError /* FIXME: Better error code? */;
        rc = cson_sqlite3_stmt_to_json( st, tgt, fat );
        sqlite3_finalize( st );
        return rc;
    }        
}

#if defined(__cplusplus)
} /*extern "C"*/
#endif
#undef MARKER
#endif /* CSON_ENABLE_SQLITE3 */
/* end file ./cson_sqlite3.c */
#endif /* FOSSIL_ENABLE_JSON */